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Omphacite

Big Photo

Bric Vert, Quincinetto, Canavese District, Torino Province, Piedmont, Italy
© GiovanniFraccaro

Show Omphacite Photos (5)
Formula:
(Ca,Na)(Mg,Al)[Si
 
2
O
 
6
]
System:MonoclinicColour:dark green
Hardness:5 - 6


Pyroxene Group.

A primary constituent of the rock eclogite.

Classification of Omphacite

IMA status:Approved
Strunz 8th edition ID:8/F.01-100
Nickel-Strunz 10th (pending) edition ID:9.DA.20

9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
Dana 8th edition ID:65.1.3b.1

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
1 : Single-Width Unbranched Chains, W=1 with chains P=2
Hey's CIM Ref.:16.24.2

16 : Silicates Containing Aluminum and other Metals
24 : Aluminosilicates of Fe, Mg, Ca and alkalis
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Type Occurrence of Omphacite

Type Locality:Eclogite outcrops, Weißenstein Mt., Stammbach, Münchberg Metamorphic complex, Franconia, Bavaria, Germany
Year of Discovery:1815

Physical Properties of Omphacite

Colour:dark green
Streak:greenish white
Hardness (Mohs):5 - 6
Cleavage:Distinct/Good

Crystallography of Omphacite

Crystal System:Monoclinic
Cell Parameters:a = 9.66Å, b = 8.81Å, c = 5.22Å
β = 106.56°
Ratio:a:b:c = 1.096 : 1 : 0.593
Unit Cell Volume:V 425.82 ų (Calculated from Unit Cell)

Optical Data of Omphacite

Type:Biaxial (+)
RI values: nα = 1.662 - 1.701 nβ = 1.670 - 1.712 nγ = 1.685 - 1.723
2V:Measured: 58° to 83°, Calculated: 74° to 88°
Maximum Birefringence:δ = 0.023

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r > v moderate

Chemical Properties of Omphacite

Formula:
(Ca,Na)(Mg,Al)[Si
 
2
O
 
6
]
Essential elements:Ca, Mg, O, Si
All elements listed in formula:Al, Ca, Mg, Na, O, Si
Common Impurities:Ti,Cr,Mn,K,H2O

Relationship of Omphacite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.DA.05Donpeacorite
(Mn
2+
 
,Mg)Mg[SiO
 
3
]
 
2
9.DA.05Enstatite
Mg
 
2
[SiO
 
3
]
 
2
9.DA.05Ferrosilite
Fe
 
2
[SiO
 
3
]
 
2
9.DA.10Clinoenstatite
Mg
 
2
[Si
 
2
O
 
6
]
9.DA.10Clinoferrosilite
Fe
2+
 
(Fe
2+
 
,Mg)[Si
 
2
O
 
6
]
9.DA.10Kanoite
Mn
2+
 
(Mg,Mn
2+
 
)[Si
 
2
O
 
6
]
9.DA.10Pigeonite
(Mg,Fe
2+
 
,Ca)(Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
9.DA.15Augite
(Ca,Na)(Mg,Fe
2+
 
,Al,Fe
3+
 
,Ti)[(Si,Al)
 
2
O
 
6
]
9.DA.15Diopside
CaMg[Si
 
2
O
 
6
]
9.DA.15Esseneite
CaFe
3+
 
[AlSiO
 
6
]
9.DA.15Hedenbergite
CaFe
2+
 
[Si
 
2
O
 
6
]
9.DA.15Johannsenite
CaMn
2+
 
[Si
 
2
O
 
6
]
9.DA.15Petedunnite
Ca(Zn,Mn
2+
 
,Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
9.DA.15Davisite
CaScAlSiO
 
6
9.DA.15Kushiroite
CaAl[AlSiO
 
6
]
9.DA.15Grossmanite
CaTi
3+
 
 AlSiO
 
6
9.DA.20Aegirine-augite
(Na,Ca)(Fe
3+
 
,Fe
2+
 
,Mg,Al)Si
 
2
O
 
6
9.DA.25Aegirine
NaFe
3+
 
[Si
 
2
O
 
6
]
9.DA.25Jadeite
Na(Al,Fe
3+
 
)[Si
 
2
O
 
6
]
9.DA.25Jervisite
(Na,Ca,Fe
2+
 
)(Sc,Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
9.DA.25Kosmochlor
NaCr[Si
 
2
O
 
6
]
9.DA.25Namansilite
NaMn
3+
 
[Si
 
2
O
 
6
]
9.DA.25Natalyite
Na(V
3+
 
,Cr)[Si
 
2
O
 
6
]
9.DA.30Spodumene
LiAl[Si
 
2
O
 
6
]
Related Minerals - Hey's Index Grouping:

- +
16.24.1Aegirine-augite
(Na,Ca)(Fe
3+
 
,Fe
2+
 
,Mg,Al)Si
 
2
O
 
6
16.24.4Magnesioferrikatophorite
[Na][CaNa][Mg
 
4
(Fe
3+
 
,Al)][(OH)
 
2
|AlSi
 
7
O
 
22
]
16.24.5Ferrikatophorite
Na[CaNa][Fe
2+
4
(Fe
3+
 
,Al)][(OH)
 
2
|AlSi
 
7
O
 
22
]
16.24.6Barroisite
☐[CaNa][Mg
 
3
AlFe
3+
 
][(OH)
 
2
|AlSi
 
7
O
 
22
]
16.24.7Ferribarroisite
☐[CaNa][Mg
 
3
Fe
3+
2
][(OH)
 
2
|AlSi
 
7
O
 
22
]
16.24.8Alumino-ferrobarroisite
☐[CaNa][Fe
2+
3
Al
 
2
][(OH)
 
2
|AlSi
 
7
O
 
22
]
16.24.9Ferrobarroisite
☐[CaNa][Fe
2+
3
AlFe
3+
 
][(OH)
 
2
|AlSi
 
7
O
 
22
]
16.24.10Ferri-ferrobarroisite
☐[CaNa][Fe
2+
3
Fe
3+
2
][(OH)
 
2
|AlSi
 
7
O
 
22
]
16.24.11Hastingsite
[Na][Ca
 
2
][Fe
2+
4
Fe
3+
 
][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
16.24.12Magnesiohastingsite
Na[Ca
 
2
][Mg
 
4
Fe
3+
 
][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
16.24.13Taramite
Na[CaNa][Fe
2+
3
AlFe
3+
 
][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
16.24.14Ferri-magnesiotaramite
Na[CaNa][Mg
 
3
Fe
3+
2
][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
16.24.15Magnesiotaramite
Na[CaNa][Mg
 
3
AlFe
3+
 
][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
16.24.16Osumilite-(Mg)
(K,Na)(Mg,Fe)
 
2
(Al,Fe)
 
3
(Si,Al)
 
12
O
 
30
·H
 
2
O
16.24.16Osumilite
(K,Na)(Fe
2+
 
,Mg)
 
2
(Al,Fe
3+
 
)
 
3
(Si,Al)
 
12
O
 
30

Other Names for Omphacite

Synonyms:
DiopsidjadeiteJadeite-DiopsideMayaiteTuxtlite
Other Languages:
Dutch:Omfaciet
French:Omphacite
German:Diopsidjadeit
Mayait
Mexikanischer Jadeit
Omphacit
Omphazit
Tuxtlit
Japanese:オンファス輝石
Polish:Omfacyt
Portuguese:Onfacite
Russian:Омфацит
Spanish:Diopsidjadeita
Mayaita
Omphacita
Tuxtlita
Varieties:
Chrome-OmphaciteTitanian Omphacite

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Omphacite

Reference List:Clark, Joan R. & J.J. Papike (1968), Crystal chemistry characterization of omphacites: American Mineralogist: 53: 840-868.

Clark, Joan R. & J.J. Papike (1969), Cation distribution in the crystal structure of omphacite, the eclogitic pyroxene: Geological Society of America Abstract for 1968.

Edgar, A.D., A. Mottana & N.D. MacRae (1969), The chemistry and cell parameters of omphacite and related pyroxenes: Mineralogical Magazine: 37: 61-74.

Champness, P.E. (1973), Speculation on an order-disorder transformation in omphacite: American Mineralogist: 58: 540-542.

Aldridge, L.P., Bancroft, G.M., Fleet, M.E., and Herzberg, C.T. (1978): Omphacite studies. II. Mössbauer spectra of C2/c and P2/n omphacites. American Mineralogist: 63: 1107-1115.

European Journal of Mineralogy (1998): 10: 889.

Internet Links for Omphacite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Omphacite in the Natural History Museum (London) online catalogue
  • Omphacite details from Handbook of Mineralogy (PDF)
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    Localities for Omphacite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Afghanistan
     
    • Badakhshan (Badakshan; Badahsan) Province
      • Koksha Valley (Kokscha; Kokcha)
    		Journal of Petrology 43(4):725-747 (2002)
    Australia
     
    • New South Wales
      • Yungnulgra Co.
        • White Cliffs
    		Eur. J. Mineral. , 1991, 3, pp. 293-322.
    • Tasmania
      • Collingwood River
    		Bottrill & Baker (in prep) Catalogue of minerals of Tasmania
    • Victoria
    		Eur. J. Mineral. , 1989, 1, pp. 105-121.
    Eur. J. Mineral. , 1989, 1, pp. 105-121.
    Austria
     
    • Carinthia
      • Friesach - Hüttenberg area
        • Hüttenberg
          • Hüttenberger Erzberg
      • Koralpe Mts
        • Maria Rojach
    		H. Meixner: Carinthia II, special ed. no. 21 (1957)
        • St Vinzenz
    		G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
      • Lavant valley
        • St Paul
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
      • Saualpe Mts
        • Ladinger Spitze Mt. - Speikkogel Mt. area
    		G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995; Mottana, A., Church, W.R., and Edgar, A.D. (1968): Contributions to Mineralogy and Petrology 18, 338-346.
    • Lower Austria
      • Dunkelsteinerwald
        • Aggsbach Dorf
    		D.A. Carswell et al., Eur.J. Mineral., 1989, 1, pp. 455-466.
      • Waldviertel
        • Horn
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Styria
      • Koralpe Mts
        • Wies
          • Wernersdorf
    		Aufschluss 1972(SB), 44
    • Tyrol
      • North Tyrol
        • Ötz valley
          • Sulz valley
    		Miller, C. (1970): Contributions to Mineralogy and Petrology 28, 42-56.
    Brazil
     
    • Southeast Region
      • Minas Gerais
    		Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html
    Canada
     
    • Newfoundland and Labrador
      • Labrador
    • Northwest Territories
      • Contwoyto Lake
    		www.venuewest.com/8IKC/s2post.htm.
    China
     
    • Anhui Province
      • Anqing Prefecture
        • Qianshan Co.
    		Luo Yan, Gao Shan, Yuan Honglin, Liu Xiaomin, Günther, D., Jin Zhenmin, and Sun Min (2004): Science in China, Series D (Earth Sciences), 47(10), 920-930.
    Eur. J. Mineral. , 1995, 7, pp. 119-138.
        • Taihu Co.
          • Lake Hualiangting
    		Franz, L., Romer, R.L., Klemd, R., Schmid, R., Oberhänsli, R., Wagner, T., and Dong Shuwen (2001): Contributions to Mineralogy and Petrology 141, 322-346.
    Wu, Xiuling, Dawei Meng, and Yujing Han (2005), α-PbO2-type nanophase of TiO2 from coesite-bearing eclogite in the Dabie Mountains, China: American Mineralogist: 90: 1458-1461
        • Tongcheng Co.
    		Yican Liu, Shutong Xu, Shuguang Li, Laili Jiang, Weiping Wu, Guanbao Chen, and Wen Su (2000): Science in China, Series D (Earth Sciences), 43(suppl.), 178-188.
    Yican Liu, Shutong Xu, Shuguang Li, Laili Jiang, Weiping Wu, Guanbao Chen, and Wen Su (2000): Science in China, Series D (Earth Sciences), 43(suppl.), 178-188.
        • Yuexi Co.
    		Yilin Xiao, Hoefs, J., van den Kerkhof, A.M., Fiebig, J., and Yongfei Zheng (2000): Contributions to Mineralogy and Petrology 139, 1-16.
          • Wumiao
    		A.I. Okay et al. , Eur. J. Mineral. , 1989, 1, pp. 595-598.
            • Marble quarry
      • Lu'an Prefecture
        • Huoshan Co.
          • Zhujiachong
    		Castelli, D., Rolfo, F., Compagnoni, R., and Shutong Xu (1998): Island Arc 7 (1-2), 159–173.
        • Shucheng Co.
    		Yican Liu, Shutong Xu, Shuguang Li, Laili Jiang, Weiping Wu, Guanbao Chen, and Wen Su (2000): Science in China, Series D (Earth Sciences), 43(suppl.), 178-188.
    Yican Liu, Shutong Xu, Shuguang Li, Laili Jiang, Weiping Wu, Guanbao Chen, and Wen Su (2000): Science in China, Series D (Earth Sciences), 43(suppl.), 178-188.
    • Henan Province
      • Nanyang Prefecture
        • Tongbai Co.
          • Tongbai
    		Chinho Tsai, Hanwen Zhou, and Yoshiyuki Iizuka (2007): Goldschmidt Conference Abstracts 2007, A 1039.
      • Xinyang Prefecture
        • Luoshan Co.
    		- Weidong Sun, Williams, I.S., and Shuguang Li (2002): Journal of Metamorphic Geology 20(9), 873-886.
    Ratschbacher, L., Franz, L., Enkelmann, E., Jonckheere, R., Pörschke, A., Hacker, B.R., Dong, S., and Zhang, Y. (2006), In: Hacker, B.R., McClelland, W.C., and Liou, J.G. (eds.): Ultrahigh-pressure metamorphism: Deep continental subduction. Geological Society of America Special Paper 403, 45–75.
    Ratschbacher, L., Franz, L., Enkelmann, E., Jonckheere, R., Pörschke, A., Hacker, B.R., Dong, S., and Zhang, Y. (2006), In: Hacker, B.R., McClelland, W.C., and Liou, J.G. (eds.): Ultrahigh-pressure metamorphism: Deep continental subduction. Geological Society of America Special Paper 403, 45–75.
        • Xin Co.
    		Ruyuan Zhang and Liou, J.G. (1994): European Journal of Mineralogy 6(2), 217-233.
    • Hubei Province
      • Huanggang Prefecture
        • Hong'an Co.
    		Yuanbao Wu, Shan Gao, Hongfei Zhang, Saihong Yang, Wenfang Jiao, Yongsheng Liu, and Honglin Yuan (2008): Contributions to Mineralogy and Petrology 155, 123-133.
        • Macheng Co.
    		Zhong Zengqiu, Zhang Hongfei, Suo Shutian, and You Zhendong (1999): Journal of China University of Geosciences 10(3).
        • Yingshan Co.
    		Zhong Zengqiu, Zhang Hongfei, Suo Shutian, and You Zhendong (1999): Journal of China University of Geosciences 10(3).
    Guxian Lü, Jing Chen, Tiping Ding, Xiaobo Li, Fangzheng Wang, and Ruixun Li (2001): Journal of Geosciences of China 3(1), 1-12.
    • Jiangsu Province
      • Lianyungang Prefecture
        • Donghai Co.
    		Yilin Xiao, Zheming Zhang, Hoefs, J., and van den Kerkhof, A. (2006): Contributions to Mineralogy and Petrology 152, 443-458.
    Zhang, R.Y., Liou, J.G., and Shu, J.F. (2002): American Mineralogist 87, 445-453.
      • Xuzhou Prefecture
        • Xinyi Co.
    		Jian Ping-Huang, Dong-Sheng Ma, Cong Liu, and Huo-Gen Chen (2006): Chinese Journal of Geochemistry 25(1), 33-42.
    • Qinghai (Chinghai) Province
      • Haibei Autonomous Prefecture
        • Qilian Co.
          • North Qilian Metamorphic Belt
    		Song Shuguang, Zhang Lifei, Niu Yaoling, Song Biao, Zhang Guibing, and Wang Qianjie (2004): Chinese Science Bulletin 49(8), 848-852.
    Song Shuguang, Zhang Lifei, Niu Yaoling, Song Biao, Zhang Guibing, and Wang Qianjie (2004): Chinese Science Bulletin 49(8), 848-852.
      • Haixi Autonomous Prefecture
        • North Qaidam UHP Terrane
    		Jingsui Yang, Shuguang Song, Zhiqin Xu, Fulai Liu, Shigenori Maruyama, Liou, J.G., Jianxin Zhang, Cailai Wu, Haibing Li, and Rendeng Shi (2001): Presented at the 11th Annual V.M. Goldschmidt Conference, Abstract no. 3088.
    Mattinson, C.G., Wooden, J.L., Liou, J.G., Bird, D.K., and Wu, C.L. (2006): American Journal of Science 306, 683-711.; American Mineralogist, Volume 94, pages 222–228, 2009
    Zhang, G., Zhang, L., Song, S., Niu, Y., and Wang, Q. (2006): Eos Trans. AGU, 87(36), West. Pac. Geophys. Meet. Suppl., Abstract V32A-03.
    Yang Jingsui et al.(2001): UHPM workshop, Waseda University.
    Chen Danling, Sun Yong, Liu Liang, Zhang Anda, and Lin Ciluan (2007): Science in China, Series D (Earth Sciences), 50(suppl. 2), 322-330.
    • Shandong Province
      • Jiaodong Gold Province
        • Qingdao Prefecture
          • Laoshan District
    		Luo Yan, Gao Shan, Yuan Honglin, Liu Xiaomin, Günther, D., Jin Zhenmin, and Sun Min (2004): Science in China, Series D (Earth Sciences), 47(10), 920-930.
      • Jinan Prefecture
        • Jinan City
          • Licheng District
            • Qinglong Mt.
    		Am. Min. , V 89, pp. 1772-1783, 2004.
    Y.F. Zheng et al. , Eur. J. Mineral. , 1996, 8, pp. 317-323.
      • Rizhao Prefecture
        • Rizhao City
    		American Mineralogist, Volume 87, pages 875-881, 2002, KAI YE et al. "Ultrahigh-pressure (UHP) low-Al titanites from carbonate-bearing rocks in Dabieshan-Sulu UHP terrane, eastern China".
    • Tibet Autonomous Region
      • Nagchu (Naqu) Prefecture
        • Qiangtang metamorphic belt
    		Kaijun Zhang, Jianxin Cai, Yuxiu Zhang, and Taiping Zhao (2006): Earth and Planetary Science Letters 245(3/4), 722-729.
    • Xinjiang (Xinjiang-Uygur) Autonomous Region
      • Bayin'gholin (Bayingolin; Bayinguoleng) Autonomous Prefecture
        • Qiemo (Qerqen; Cherchen) Co.
          • Jianggalesayi area
    		Zhang, J.X. et al. (2001): Lithos 56, 187-206.
      • Yili Hasake (Ili Kazakh) Autonomous Prefecture
    		Wei Lin and Masaki Enami (2006): Island Arc 15(4), 483-502.
        • Zhaosu Co.
    		Lifei Zhang, Jun Gao, Ekebair, S., and Zongxiu Wang (2001): Science in China, Series D (Earth Sciences), 44(1), 85-96.
    Cuba
     
    • Guantánamo Province
    		Garcia-Casco, A. et al (2009) A new jadeitite jade locality (Sierra del Convento, Cuba): first report and some petrological and archeological implications. Contributions to Mineralogy and Petrology, 158, #1, 1-16.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Central Bohemia Region
        • Kutná Hora (Kuttenberg)
      • Ústí Region
        • Třebenice (Trebnitz)
    		Seifert, A.V., Vrana, S. (2005): Bohemian garnet, Bulletin of Geosciences, Vol. 80, 113-124
    • Moravia (Mähren; Maehren)
      • Vysočina Region
        • Třebíč
          • Rouchovany
    		Bernard J.H. and Hyrsl J. (2004) Minerals and their Localities.
    France
     
    • Brittany
      • Finistère
        • Lesneven
    		Bull. Minéral. , 1987, 110, pp. 683-696.
      • Morbihan
        • Groix
          • Groix Island
    		Inventaire Minéralogique de la France numero 9 Morbihan ( éditions BRGM )
    • Limousin
      • Haute-Vienne
    		D. Coffrant, Bull. Soc. Fr. Minéral. Cristallogr. , 1974, 97, pp. 70-78.
    • Provence-Alpes-Côte d'Azur
      • Hautes-Alpes
        • Briançon
          • Abries
            • Monviso (Monte Viso)
    		Messiga et al. : "Cr-rich Magnesiochloritoid Eclogites from the Monviso ophiolites (Western Alps Italy)", Journal of Metamorphic Geology, Vol 17, Issue 3, p. 287, May 1999.
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Wolfach
          • Oberwolfach
            • Rankach valley
    		KAISER, H. (1984): Die Grube Clara zu Wolfach im Schwarzwald. Verlag Karl Schillinger, Freiburg im Breisgau, 102 pp. (in German)
    • Bavaria
      • Franconia
        • Münchberg Metamorphic complex
          • Bad Berneck
          • Konradsreuth
    		[var: Chrome-Omphacite] F. Müller: "Bayerns steinreiche Ecke", 2nd ed., Oberfränkische Verlagsanstalt (Hof), 1984
          • Marktschorgast
    		F. Müller: "Bayerns steinreiche Ecke", 2nd ed., Oberfränkische Verlagsanstalt (Hof), 1984
          • Oberkotzau
    		F. Müller: "Bayerns steinreiche Ecke", 2nd ed., Oberfränkische Verlagsanstalt (Hof), 1984
          • Schwarzenbach an der Saale
    		F. Müller: "Bayerns steinreiche Ecke", 2nd ed., Oberfränkische Verlagsanstalt (Hof), 1984
          • Stammbach
            • Weißenstein Mt.
    		[Clark, 1993 - "Hey's Mineral Index"]
          • Wölbattendorf
    		F. Müller: "Bayerns steinreiche Ecke", 2nd ed., Oberfränkische Verlagsanstalt (Hof), 1984
    • Saxony
      • Erzgebirge
        • Clausnitz - Sayda District
          • Voigtsdorf
    		Eur. J. Mineral. , 1991, 3, pp. 291-238.
        • Großhartmannsdorf
    		Eur. J. Mineral. , 1991, 3, pp. 291-238.
    Eur. J. Mineral. , 1991, 3, pp. 291-238.
        • Olbernhau
          • Zöblitz
    		Eur. J. Mineral. , 1991, 3, pp. 291-238.
        • Pockau
          • Forchheim
    		Eur. J. Mineral. , 1991, 3, pp. 291-238.
    Greece
     
    • Aegean Islands (Aiyaíon) Department
      • Kykládes Prefecture
        • Cyclade Islands (Cyclades; Kikladhes; Nomos Kikladhon)
          • Andros Island
    		Reinecke, T. (1982): Contributions to Mineralogy and Petrology 79, 333-336.
          • Sifnos Island
    		Eur. J. Mineral. , 1992, 4, pp. 619-634.
    • Thraki (Thrace; Thracia) Department
      • Komotini (Rodopi; Rhodope) Prefecture
        • Thermes
    		Eur. J. Mineral. , 1994, 6, pp. 733-738.
    Guatemala
     
    • Jalapa Department
    		[var: Titanian Omphacite] http://gsa.confex.com/gsa/2003AM/finalprogram/abstract_65497.htm.
    • Motagua Valley
    		Am. Miner., V. 90, pp. 836-842, 2005.
    India
     
    • Maharashtra
      • Mumbai District (Bombay District)
        • Murud-Janjira
    		A.G. Dessai et al. , Eur. J. Mineral. , 1990, 2, pp. 667-685.
    Italy
     
    • Aosta Valley
      • Lys Valley
    		Ch. Robert et al. , Bull. Minéral. , 1985, 108, pp. 699-711.
      • Pont-Saint-Martin
    		Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
      • Saint-Marcel
    		Kienast, J.R. & Martin, S. (1983): I pirosseni egirin-giadeitici del livello basale di Praborna, Alpi occidentali. Ofioliti, 8(2), 245-260.
    • Liguria
      • Genova Province
        • Genova
          • Voltri
            • Vara Valley
      • Savona Province
        • Sassello
          • Piampaludo
    		Antofilli, Borgo, Palenzona, 1985. I nostri minerali. Geologia e mineralogia in Liguria. Edizioni Melita, La Spezia.
    • Piedmont
      • Biella Province
    		Piccoli, G. C., Maletto, G., Bosio, P., & Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo F. Eusebio - Alba, 607 pag.
      • Cuneo Province
        • Dora Maira Massif
          • Varaita Valley
    		T. Hirajima and R. Compagnoni : "Petrology of a jadeite-quartz-almandine-phengite fels with retrograde ferro-nyböite from the Dora-Maira Massif, Western Alps", Eur. Journ. Mineral., 1993, 5, pp 943-955.
        • Varaita Valley
          • Sampeyre
    		Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
      • Torino Province
        • Canavese District
          • Quincinetto
        • Orco Valley
          • Courgnè
    		Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d\'Aosta. Associazione Amici del Museo \"F. Eusebio\" Alba, Ed., Alba (Cuneo) 607 pp.
    Ch. Robert et al. , Bull. Minéral. , 1985, 108, pp. 699-711.
        • Sesia-Lanzo zone
          • Lanzo Valley
            • Lanzo Massif
              • Balangero - Corio area
                • Malone Valley
    		Eur. J. Mineral. , 1989, 1, pp. 89-104.
    Eur. J. Mineral. , 1989, 1, pp. 89-104.
    Eur. J. Mineral (1989): 1: 89-104.
                  • Rocca Canavese
    		Eur. J. Mineral. , 1989, 1, pp. 89-104.
    Eur. J. Mineral (1989): 1: 89-104.
    Eur. J. Mineral. , 1989, 1, pp. 89-104.
    Eur. J. Mineral. , 1989, 1, pp. 89-104.
    Eur. J. Mineral. , 1989, 1, pp. 89-104.
    Japan
     
    • Honshu Island
      • Chubu Region
        • Niigata Prefecture
    		[MinRec 33:168]
    Fossa Magna Museum specimens
            • Ohmi
    		Alluvial cobbles in innumerable collections; common.
    Kazakhstan
     
    • Kökshetaü Oblysy (Kokshatau [Kokchetav] Oblast')
    Lesotho
     
    • Butha-Buthe District
    New Caledonia
    AmMin 55:512
    AmMin 55:512
    Nigeria
     
    • Katsina State
    Norway
     
    • More og Romsdal
      • Haram
    		J. Metam. Geol. , 2003, 21, pp. 601-612.
      • Ulstein
        • Hareidland
    		[Clark, 1993 - "Hey's Mineral Index"]
    J. Metam. Geol. , 2003, 21, pp. 601-612.
    • Nordland
      • Lofoten
        • Flakstad
          • Flakstadøy Island
    • Sogn og Fjordane
      • Nordfjord
    		L. Ungaretti et al. , Bull. Minéral., 1981, 104, pp. 400-412, France.
    J. Metam. Geol. , 2003, 21, pp. 601-612.
      • Selje
    		Wikström, A. (1970): Electron micro-probe studies of the alteration of omphacite in eclogites from the Nordfjord area, Norway. Norsk Geologisk Tidsskrift 50, 136-155
        • Nordpollen
    		J. Metam. Geol. , 2003, 21, pp. 601-612.
    J. Metam. Geol. , 2003, 21, pp. 601-612.
    • Svalbard
      • Spitsbergen
        • Oscar II land
    		MINERALOGICAL MAGAZINE, JUNE 1984, VOL. 48, PP. 30l-3
    • Troms
      • Tromsø
    		Bøe, P. (1997): Eklogittfjellet Tromsdalstind. STEIN 24 (2), 48-49
    Pakistan
     
    • North-West Frontier Province
      • Mansehra District
        • Khagan valley
    		Eur. J. Mineral. , 1991, 3, pp. 613-618.
    Poland
     
    • Małopolskie
      • Olkusz District
    		Ref.: Kucha H., Jędrzejczyk B. 1995: Primary minerals of mining and metallurgical Zn-Pb dumps at Bukowno, Poland, and their stability during weathering. Mineralogia Polonica, vol. 26, No 2, 75-99
    Russia
     
    • Eastern-Siberian Region
      • Saha Republic (Sakha Republic; Yakutia)
    		[World of Stones 12:49]
        • Daldyn-Alakit kimberlite field
          • Alakit-Markha
    		Zinchuk, N.N., and Koptil, V.I. (2007): Geology of Ore Deposits 49(4), 308-317.
          • Daldyn
    		http://www.geology.utoronto.ca/faculty/schulze/eclogite.table.1.html
    Slovenia
     
    Franz Bernhard, 2005
    South Africa
     
    • Free State Province
      • Boshof
    		Am Min 62:828-830
    Switzerland
     
    • Ticino (Tessin)
      • Riviera
        • Bellinzona
          • Gorduno
    		Journal of Metamorphic Geology, Volume 20 Issue 5 Page 481 - June 2002
    • Wallis (Valais)
      • Zermatt - Saas Fee area
        • Saas Valley
          • Saas Almagell
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 290.
    Turkey
     
    • Central Anatolia Region
      • Eskisehir Province
        • Tavşanlı Zone
    		Davis, P.B., and Whitney, D.L. (2006): Journal of Metamorphic Geology 24(9), 823-849.
    • Marmara Region
      • Balikesir Province
    		Turkish J. Earth Sci. 9:47-56 (2000)
          • Bayramiç
    		Turkish Journal of Earth Sciences, Vol. 9, 2000, pp. 47-56.
    USA
     
    • Arizona
      • Apache Co.
        • Navajo Indian Reservation
          • Monument Valley
            • Dinnehotso
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 102, 260, 318; Watson, K.D. & D.M. Morton (1969), Eclogite inclusions in kimberlite pipes at Garnet Ridge, northeastern AZ, Am.Min.: 54: 267-285.
    • California
      • Fresno Co.
        • Diablo Range
    		Essene, E.J. and W.S. Fyfe (1967) Omphacite in California metamorphic rocks. Contributions to Mineralogy and Petrology: 15: 8; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 393.
      • Marin Co.
        • Tiburon Peninsula
      • San Benito Co.
        • Diablo Range
          • New Idria District
    		T. Tsujimori et al., Paper N° 21-6, The Geological Society of America, Joint Meeting Cordilleran Section and Pacific Section, 101st Annual Meeting, 29 April-1 May 2005, San Jose, California.
      • Sonoma Co.
        • Cazadero
    		Essene, E.J. and W.S. Fyfe (1967) Omphacite in California metamorphic rocks. Contributions to Mineralogy and Petrology: 15, 23 pp.: 4; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 394.
        • Cloverdale
          • North of Cloverdale
    		Essene, E.J. and W.S. Fyfe (1967) Omphacite in California metamorphic rocks. Contributions to Mineralogy and Petrology: 15, 23 pp.: 4; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 393.
    http://gsa.confex.com/gsa/2004AM/finalprogram/abstract_78888.htm
          • Mill Creek Road
    		Switzer, George S. (1945), Eclogite from the California glaucophane schists: American Journal of Science: 243: 2; Switzer, George S. (1951b) Mineralogy of the California glaucophane schists. California Division of Mines and Geology Bulletin 161: 56-57; Coleman, R.G., D.E. Lee, L.B. Beaty & W.W. Bannock (1965), Eclogites and eclogites: their differences and similarities: Geological Society of America Bulletin: 76: 489; Edgar, A.D., A. Mottana, and N.D. MacRae (1969) The chemistry of cell parameters of omphacite and related pyroxenes. Mineralogical Magazine: 37: 64, 67-68; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 404.
        • Jenner
    		http://geology.about.com/library/bl/images/bleclogite.htm
        • Mayacmas Mts (Mayacamas Mts)
          • West Mayacmas District
            • Occidental
    		Coleman, R.G., D.E. Lee, L.B. Beaty & W.W. Bannock (1965), Eclogites and eclogites: their differences and similarities: Geological Society of America Bulletin: 76: 489; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 484.
    • Colorado
      • Larimer Co.
    		Minerals of Colorado (1997) Eckels, E. B.
    • Maryland
      • Montgomery Co.
        • Rockville
    		David Schoeberlein Collection
    • North Carolina
      • Mitchell Co.
        • Cane Creek Section
    		J. Metamorphic Geol. 21:685–698 (2003)
    Ref: Stewart, Adams, and Trupe-1997 and Abbott and Raymond-1997
    • Vermont
    		Rocks & Min. Vol. 71, (1996)
      • Orleans Co.
    		Rocks & Min. Vol. 71, (1996)
    • Washington
      • Okanogan Co.
        • Colville Indian Reservation
    		Cannon, B. (1975): Minerals of Washington, p.39
    Venezuela
     
    • Bolívar
    		Canadian Mineralogist (2000) Vol. 38, pp. 1347-137
    • Nueva Esparta
      • Margarita Island
    		Journal of Petrology (1981) Volume 22; Number 3; Pages 337-362
    Mineral and/or Locality
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