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Gyrolite

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Malad Quarry, Malad, Ward 38, Mumbai (Bombay), Mumbai District (Bombay District), Maharashtra, India

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Formula:
NaCa
 
16
Si
 
23
AlO
 
60
(OH)
 
8
 · 14H
 
2
O
The crystal-chemical formula which accounts for
most gyrolite samples is Ca16Si24O60(OH)8.(14+x)H2O, with 0 < x < 3.
System:TriclinicColour:Brown, Colorless, White, ...
Hardness:2½
Member of:Gyrolite Group
Name:From the Greek guros = "circle", in allusion to the round form of the crystalline groupings


Gyrolite Group.

Classification of Gyrolite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/H.34-40
Nickel-Strunz 10th (pending) edition ID:9.EE.30

9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands
Dana 7th edition ID:73.2.2.1
Dana 8th edition ID:73.2.2c.1

73 : PHYLLOSILICATES Condensed Tetrahedral Sheets
2 : Condensed Tetrahedral Sheets with double and single layers
Hey's CIM Ref.:14.5.21

14 : Silicates not Containing Aluminum
5 : Silicates of Ca
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Type Occurrence of Gyrolite

Type Locality:The Storr, Portree, Trotternish, Isle of Skye, North West Highlands (Inverness-shire), Scotland, UK
Year of Discovery:1851

Occurrences of Gyrolite

Geological Setting:Hydrothermally altered basalt and basaltic tuffs

Physical Properties of Gyrolite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Brown, Colorless, White, Green
Streak:White
Hardness (Mohs):2½
Tenacity:Brittle
Cleavage:Perfect
Fracture:Irregular/Uneven
Density (measured):2.45 - 2.51 g/cm3
Density (calculated):2.74 g/cm3

Crystallography of Gyrolite

Crystal System:Triclinic
Cell Parameters:a = 9.74Å, b = 9.74Å, c = 22.4Å
α = 95.71°, β = 91.51°, γ = 120.01°
Ratio:a:b:c = 1 : 1 : 2.3
Unit Cell Volume:V 1,823.86 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Gyrolite

Type:Biaxial (-)
RI values: nα = 1.535 nβ = 1.548 nγ = 1.549
Maximum Birefringence:δ = 0.014

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

Chemical Properties of Gyrolite

Formula:
NaCa
 
16
Si
 
23
AlO
 
60
(OH)
 
8
 · 14H
 
2
O


The crystal-chemical formula which accounts for
most gyrolite samples is Ca16Si24O60(OH)8.(14+x)H2O, with 0 < x < 3.
Essential elements:Al, Ca, H, Na, O, Si
All elements listed in formula:Al, Ca, H, Na, O, Si
Common Impurities:Fe,Mg

Relationship of Gyrolite to other Species

Member of:Gyrolite Group
Other Members of Group:

- +
Orlymanite
Ca
 
4
Mn
 
3
Si
 
8
O
 
20
(OH)
 
6
 · 2H
 
2
O
Tungusite
Ca
 
4
Fe
 
2
Si
 
6
O
 
15
(OH)
 
6
Related Minerals - Nickel-Strunz Grouping):

- +
9.EE.05Bementite
Mn
 
7
Si
 
6
O
 
15
(OH)
 
8
9.EE.10Brokenhillite
Mn
 
8
Si
 
6
O
 
15
(OH)
 
10
9.EE.10Pyrosmalite-(Fe)
(Fe,Mn)
 
8
Si
 
6
O
 
15
(OH,Cl)
 
10
9.EE.10Friedelite
(Mn,Fe)
 
8
Si
 
6
O
 
15
(OH,Cl)
 
10
9.EE.10Pyrosmalite-(Mn)
(Mn,Fe)
 
8
Si
 
6
O
 
15
(OH,Cl)
 
10
9.EE.10Mcgillite
(Mn,Fe)
 
8
Si
 
6
O
 
15
(OH)
 
8
Cl
 
2
9.EE.15Nelenite
(Mn,Fe)
 
16
(Si
 
12
O
 
30
)(OH)
 
14
[As
3+
3
O
 
6
(OH)
 
3
]
9.EE.15Schallerite
(Mn,Fe)
 
16
Si
 
12
As
 
3
O
 
36
(OH)
 
17
9.EE.20Palygorskite
(Mg,Al)
 
5
(Si,Al)
 
8
O
 
20
(OH)
 
2
 · 8H
 
2
O
9.EE.20Tuperssuatsiaite
Na
 
2
Fe
 
3
Si
 
8
O
 
20
(OH)
 
2
 · 4H
 
2
O
9.EE.20Yofortierite
Mn
 
5
Si
 
8
O
 
20
(OH)
 
2
 · 8-9H
 
2
O
9.EE.20Windhoekite
Ca
 
2
Fe
3+
2.67
[Si
 
8
O
 
20
](OH)
 
4
 · 10H
 
2
O
9.EE.25Falcondoite
(Ni,Mg)
 
4
Si
 
6
O
 
15
(OH)
 
2
 · 6H
 
2
O
9.EE.25Loughlinite
Na
 
2
Mg
 
3
Si
 
6
O
 
16
 · 8H
 
2
O
9.EE.25Sepiolite
Mg
 
4
(Si
 
6
O
 
15
)(OH)
 
2
 · 6H
 
2
O
9.EE.25Kalifersite
(K,Na)
 
5
Fe
3+
7
Si
 
20
O
 
50
(OH)
 
6
 · 12H
 
2
O
9.EE.30Orlymanite
Ca
 
4
Mn
 
3
Si
 
8
O
 
20
(OH)
 
6
 · 2H
 
2
O
9.EE.30Tungusite
Ca
 
4
Fe
 
2
Si
 
6
O
 
15
(OH)
 
6
9.EE.35Reyerite
(Na,K)
 
2
Ca
 
14
(Si,Al)
 
24
O
 
58
(OH)
 
8
 · 6H
 
2
O
9.EE.35Truscottite
(Ca,Mn)
 
14
Si
 
24
O
 
58
(OH)
 
8
 · 2H
 
2
O
9.EE.40Natrosilite
Na
 
2
Si
 
2
O
 
5
9.EE.45Makatite
Na
 
2
Si
 
4
O
 
8
(OH)
 
2
 · 4H
 
2
O
9.EE.50Varennesite
Na
 
8
Mn
 
2
Si
 
10
O
 
25
(OH,Cl)
 
2
 · 12H
 
2
O
9.EE.55Raite
Na
 
4
Mn
2+
3
Ti
 
0.25
Si
 
8
O
 
20
(OH)
 
2
 · 10H
 
2
O
9.EE.60Intersilite
Na
 
6
Mn
2+
 
Ti[Si
 
10
O
 
24
(OH)](OH)
 
3
 · 4H
 
2
O
9.EE.65Shafranovskite
(Na,K)
 
6
(Mn,Fe)
 
3
Si
 
9
O
 
24
 · 6H
 
2
O
9.EE.65Zakharovite
Na
 
4
Mn
 
5
Si
 
10
O
 
24
(OH)
 
6
 · 6H
 
2
O
9.EE.70Zeophyllite
Ca
 
4
Si
 
3
O
 
8
(OH,F)
 
4
 · 2H
 
2
O
9.EE.75Minehillite
(K,Na)
 
2-3
Ca
 
28
Zn
 
4
Al
 
4
Si
 
40
O
 
112
(OH)
 
16
9.EE.80Fedorite
(Na,K)
 
2-3
(Ca
 
4
Na
 
3
)Si
 
16
O
 
38
F
 
2
 · 3.5H
 
2
O
9.EE.80Martinite
(Na,Ca)
 
11
Ca
 
4
(Si,S,B)
 
14
B
 
2
O
 
40
F
 
2
·4H
 
2
O
9.EE.85Lalondeite
(Na,Ca)
 
6
(Ca,Na)
 
3
Si
 
16
O
 
38
(F,OH)
 
2
·3H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
14.5.1Wollastonite
CaSiO
 
3
14.5.2Wollastonite-7T
14.5.3Wollastonite-2M
CaSiO
 
3
14.5.4Rankinite
Ca
 
3
Si
 
2
O
 
7
14.5.5Kilchoanite
Ca
 
3
Si
 
2
O
 
7
14.5.6Larnite
Ca
 
2
SiO
 
4
14.5.7Bredigite
Ca
 
7
Mg(SiO
 
4
)
 
4
14.5.8Hatrurite
Ca
 
3
(SiO
 
4
)O
14.5.9Rosenhahnite
HCa
 
3
[Si
 
3
O
 
9
(OH)]
14.5.10Dellaite
Ca
 
6
(Si
 
2
O
 
7
)(SiO
 
4
)(OH)
 
2
14.5.11Afwillite
Ca
 
3
(HSiO
 
4
)
 
2
 · 2H
 
2
O
14.5.12Xonotlite
Ca
 
6
(Si
 
6
O
 
17
)(OH)
 
2
14.5.13Foshagite
Ca
 
4
(Si
 
3
O
 
9
)(OH)
 
2
14.5.14Hillebrandite
Ca
 
2
(SiO
 
3
)(OH)
 
2
14.5.15Jaffeite
Ca
 
6
(Si
 
2
O
 
7
)(OH)
 
6
14.5.16Suolunite
Ca
 
2
(H
 
2
Si
 
2
O
 
7
) · H
 
2
O
14.5.17Killalaite
Ca
 
3
(Si
 
2
O
 
7
) · 0.5H
 
2
O
14.5.18Okenite
CaSi
 
2
O
 
5
 · 2H
 
2
O
14.5.19Riversideite
Ca
 
5
(HSi
 
3
O
 
9
)
 
2
 · 2H
 
2
O
14.5.20Trabzonite
Ca
 
4
(Si
 
3
O
 
10
) · 2H
 
2
O
14.5.22Foshallasite
Ca
 
3
[Si
 
2
O
 
7
] · 3H
 
2
O(?)
14.5.23Tobermorite
Ca
 
4+x
(H
 
2-2x
Si
 
6
O
 
17
) · 5H
 
2
O
14.5.24Clinotobermorite
Ca
 
5
(Si
 
6
O
 
17
) · 5H
 
2
O
14.5.25Nekoite
Ca
 
3
Si
 
6
O
 
15
·7H
 
2
O
14.5.26Plombièrite
Ca
 
5
(HSi
 
3
O
 
9
)
 
2
 · 7H
 
2
O
14.5.27Jennite
Ca
 
9
(Si
 
3
O
 
9
)
 
2
(OH)
 
8
 · 8H
 
2
O

Other Names for Gyrolite

Synonyms:
CentrallasiteCentrallassiteGlimmer ZeoliteGurolite
Other Languages:
German:Centrallasit
Centrallassit
Glimmerzeolith
Gurolit
Gyrolit
Russian:Гиролит
Spanish:Centrallasita
Centrallassita
Gurolita
Gyrolita

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 Gyrolite

Reference List:

- +
Anderson, T. (1851). Description and Analysis of Gyrolite, a New Mineral. Philos. Mag. Sect. IV, 1, 111-115.

Currie, J. (1905). Note on some new localities for Gyrolite and Tobermorite. Mineralogical Magazine, 14, 93-95.

Mackay, A. L., & Taylor, H. F. W. (1953). Gyrolite. Mineralogical Magazine, 30, 80-91.

Mamedov, K.S. and Belov, N.V. (1958) Crystal structure of mica-like hydrous calcium silicates: okenite, nekoite, truscottite, and gyrolite New silicate radical [Si6O15]. Doklady Akademii Nauk SSSR: 121: 713-716.

Cann, J. R. (1965). Gyrolite and reyerite from 'S Airde Beinn, northern Mull. Mineralogical Magazine, 35, 1-4.

Gottardi, G., & Passaglia, E. (1966). Tobermorite "non espandibile" e gyrolite del Monte Biaena (Trento). Periodico di Mineralogia, 36, 1079-1083.

Kobayashi, A., & Kawai, T. (1974). Gyrolite found in the andesitic tuffs, near the Sayama lake, Ueda city, Nagano Prefecture, Japan. Geosci. Mag., 25, 367-370.

Garavelli, C. L., & Vurro, F. (1984). Gyrolite from Ortano (Island of Elba). Rendiconti della Società Italiana di Mineralogia e Petrologia, 39, 695-704.

Merlino, S. (1988). Gyrolite: its crystal structure and crystal chemistry. Mineralogical Magazine, 52, 377-387.

Internet Links for Gyrolite

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  • Gyrolite details from Handbook of Mineralogy (PDF)
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    • Localities for Gyrolite

    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.
    Hide Locality List
    (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.
    Australia
     
    • New South Wales
      • Buckland Co.
        • Ardglen
    		Mineralogical Record Vol 19, No.6 p389; Tschernich, R.(1992), Zeolites of the World, p.48
    • Tasmania
      • Burnie district
        • Ridgley
    		Mathew Latham coll.
      • Central Plateau
    		Bottrill & Baker (in prep) Catalogue of minerals of Tasmania
      • Marrawah district
        • Redpa
    		http://www.crocoite.com/locationbulletins/part1/zeolites.pdf
      • Tamar Valley
    		http://www.crocoite.com/locationbulletins/part1/zeolites.pdf
      • Upper Mersey Valley
    		http://www.crocoite.com/mainadit/gadshill.htm
    Canada
     
    • British Columbia
      • Cariboo Mining Division
        • 100 Mile House
    		Tschernich, R. (1992): Zeolites of the World, p.51
    • Nova Scotia
      • Annapolis Co.
    		Tschernich, R. (1992): Zeolites of the World, p.143 Johnston, R. A. A., "A List of Canadian Mineral Occurrences", Memoir 74, Can. Dept. Mines, 1915.
    • Québec
      • Chaudière-Appalaches
        • Les Appalaches RCM
          • Saint-Joseph-de-Coleraine
    		Canadian Museum of Nature & Horvath collections XRD
    China
     
    • Hebei Province
      • Handan Prefecture
        • She Co.
    		Cao Zhengmin, Bi Yurun, and Wang Peiying (1987): Acta Petrologica et Mineralogica 6(2)
    Costa Rica
     
    • Alajuela Province
    		Micro Probe Volume VII Number 7 Spring 1993
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Liberec Region
        • Česká Lípa (Böhmisch Leipa)
    		J.E.Hibsch-Die Minerale des Böhmischen Mittelgebirges (Jena 1934)
    • Moravia (Mähren; Maehren)
      • Vysočina Region
        • Havlíčkův Brod (Německý Brod; Deutschbrod)
    		Pauliš, P.: Nejzajímavější mineralogická naleziště Čech II. Kutná Hora: Kuttna, 2003, s. 96 - 98.
    Denmark
     
    • Faroe Islands (Faeroe Islands; Faeroes; Faroes)
      • Eysturoy island
    		Burvald, I. (2013): På mineraljakt i sporet etter en "anderledes" Ormen Lange. Stein. 40 (1), 4-12
    Zeolites of the World, R. Tschernich, 1992 (53)
    Franz J. Schmitter (2008) Zeolithe aus dem Hohen Norden: Sammeltouren auf den Faroer-Inseln. Lapis, 33, #2, 29-35.
    Franz J. Schmitter (2008) Zeolithe aus dem Hohen Norden: Sammeltouren auf den Faroer-Inseln. Lapis, 33, #2, 29-35.
      • Streymoy island
    		Franz J. Schmitter (2008) Zeolithe aus dem Hohen Norden: Sammeltouren auf den Faroer-Inseln. Lapis, 33, #2, 29-35.
    Zeolites of the World, R. Tschernich, 1992 (301)
    Zeolites of the World, R. Tschernich, 1992 (301)
    Franz J. Schmitter (2008) Zeolithe aus dem Hohen Norden: Sammeltouren auf den Faroer-Inseln. Lapis, 33, #2, 29-35.
      • Vágar island (Vagur island)
    		Christian Bracke Collection.
    Burvald, I. (2003): Mineralforekomster på Færøyene. Norsk Bergverksmuseums Skrift 25, 29-34
    Federated States of Micronesia
     
    Kelly Nash Collection specimen (Ex Myer Crumb Coll.)
    France
     
    • Midi-Pyrénées
      • Aveyron
        • Espalion
    		Boutry C., Pelisson P., Pillard F. (1986), Les zéolites d'Espalion, Le Cahier des Micromonteurs, n°2, pp: 3-7
      • Hautes-Pyrénées
        • Bagnères de Bigorre
          • Pouzac
    		Domenico Preite collection
    French Polynesia
     
    • Tuamotu-Gambier
      • Tuamotu Archipelago (Tuamotus)
        • Mururoa Lagoon
    		Y. Noack (1983) Occurrence of Thaumasite in a Seawater-Basalt Interaction, Mururoa Atoll (French Polynesia, South Pacific) Mineralogical Magazine 47:47-50.
    Germany
     
    • Bavaria
      • Franconia
        • Maroldsweisach
    		No reference listed
    • Hesse
      • Vogelsberg
        • Homberg
          • Nieder-Ofleiden
    		S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
        • Ortenberg
    		Kolitsch, U. (1997): Tacharanit vom Gaulsberg bei Ortenberg (Vogelsberg, Hessen). Mineralien-Welt 8 (2), 25-26
    • Lower Saxony
      • Göttingen
        • Adelebsen
    		Koritnig, S. (1972). Gyrolith, Okenit und Tacharanit als metasomatische Reaktionsprodukte aus dem Basaltvorkommen der Bramburg bei Göttingen, Deutschland. Contrib. Mineral. Petrol. 35, 293-301. (in German); Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Rhineland-Palatinate
      • Eifel
        • Hillesheim
          • Zilsdorf
    		Hentschel, G., Die Mineralien des Arensberges bei Zilsdorf, Eifel, Der Aufschluß 29, 219-227, 1978
        • Mayen
          • Ettringen
            • Bellerberg volcano
    		[Blass, G., Graf, H.W., Neue Mineralfunde - mineralogische Raritäten - aus der Vulkaneifel, Mineralien-Welt 7/5, 28, 1996] [A. Wittern: Mineralfundorte in Deutschland, Schweizerbart (Stuttgart), 2001]
    Greenland
     
    • Kitaa (West Greenland) Province
      • Qeqertarsuaq Island (Disko Island)
    		Nelly Jensen collection
    Merlino, S. (1988). Gyrolite: its crystal structure and crystal chemistry. Mineralogical Magazine, 52, 377-387.
    Iceland
     
    Selbekk, R. S. & Mattsson, H. (2004): Zeolitt mineraliseringer i Hvalfjördur, Island. STEIN 31 (1), 28-33
    • Reydarfjörđur
    		Mineralogical Magazine 1962 33:173-186.
    • Suður-Múlasýsla
      • Breiðdalsheidi
        • Heiðarvatn
    		Zeolite collection of Volker Betz
    India
     
    • Maharashtra
      • Mumbai District (Bombay District)
        • Mumbai (Bombay)
    		Moore, T. (2002) What's New in Minerals?. Tucson Show 2002. Mineralogical Record. 33: 274
          • Ward 38
            • Malad
    		Personal experience-Rock Currier
    [www.johnbetts-fineminerals.com]
      • Nashik District (Nasik District)
    		Ottens (2003)
    P Haas collection
    Meyer, I. (1982): Gyrolith. Die verschiedenen Färbungen und ihre Ursachen. LAPIS 7 (3), 14-16
        • Lonavale (Lonavala)
    		[www.johnbetts-fineminerals.com]
        • Pashan
    		Stefan Koch specimen
    Israel
     
    • Negev
    		Gross, S. (1977): The Mineralogy of the Hatrurim Formation, Israel. Geological Survey of Israel, Bulletin no. 70, 80 pp.
    Italy
     
    • Veneto
      • Padova Province
        • Euganei Hills
          • Faedo
    		Passaglia E. and Taglavini A. (1995): Erionite from Faedo, Colli Euganei, Italy. N.Jb.Miner.Mh.,4, pagg.185-191.
      • Verona province
        • Vestenanuova
    		M.Mattioli, M.Cenni, G.Raffaelli (2008): I Minerali del Veronese - Le mineralizzazioni secondarie delle rocce vulcaniche dei Monti Lessini. Memorie del Museo Civico di Storia Naturale di Verona, II° serie - sezione Scienze della Terra 7 - 2008, 196
      • Vicenza Province
        • Cornedo Vicentino
          • Spagnago
    		Boscardin M.,Daleffe A.,Rocchetti I., Zordan A. (2011) " Minerali del Vicentino - Aggiornamenti, località e nuove determinazioni " Museo di Archeologia e Scienze Naturali “G. Zannato” – Montecchio Maggiore (Vicenza), pp.183; - Boscardin M.,Daleffe A.,Rocchetti I., Zordan A. (2011) " Minerali del Vicentino - Aggiornamenti, località e nuove determinazioni " Museo di Archeologia e Scienze Naturali “G. Zannato” – Montecchio Maggiore (Vicenza), pp.183
        • Gambellara
          • S.Marco hill
    		"Minerali del Vicentino - La natrolite" M. Boscardin, S. Pegoraro. Rivista Mineralogica Italiana n. 1 / 2000 pp. 4-11
    Boscardin, M., Mietto, P., Pegoraro, S., Orlandi, P., Secco, L.(2000):
    Japan
     
    • Honshu Island
      • Kanto Region
        • Chiba Prefecture
          • Awa-gun
            • Tawara-mura
          • Kamogawa city
    		Dr. Kameki Kinoshita collection (curated at Geological Survey of Japan)
      • Tohoku Region
        • Yamagata Prefecture
          • Tsuruoka
            • Atsumi-cho
    		Mizota (1969) Ganseki-Koubutsu-Koshogaku Zasshi, 62, 329-338.
    • Kyushu Region
      • Kagoshima Prefecture
        • Kushikino City
    		Dr. Kameki Kinoshita collection (curated at Geological Survey of Japan)
    Norway
     
    • Nordland
      • Fauske
        • Sulitjelma
          • Sulitjelma Cu Mines
    		Nordrum, F.S. (2004): Mineralene i Sulitjelma kobbergruver, Fauske. STEIN 31 (3): 3-25
    Portugal
     
    • Azores District
    		S.M. Topa photo
    Romania
     
    • Hunedoara Co.
    		www.minerals-of-the carpathians.eu (2009)
    Russia
     
    • Eastern-Siberian Region
      • Taymyrskiy Autonomous Okrug
        • Taimyr Peninsula
          • Putoran Plateau
    		Spiridonov, E.M., Gritsenko, Y.D., and Ponomarenko, A.I. (2008): Geology of Ore Deposits 50(8), 755-762.
    • Urals Region
      • Middle Urals
        • Sverdlovskaya Oblast'
          • Sysert' District
            • Polevskoi (Polevskoi Zavod)
    		American Mineralogist, Volume 94, pages 323–333, 2009
      • Southern Urals
        • Chelyabinsk Oblast'
    		Cesnokov, B., Kotrly, M. and Nisanbajev, T. (1998): Brennende Abraumhalden und Aufschlüsse im Tscheljabinsker Kohlenbecken - eine reiche Mineralienküche. Mineralien-Welt, 9 (3), 54-63 (in German).
    No reference listed
    Slovakia
     
    • Prešov Region
      • Vranov nad Topľou Co.
    		Ďuďa,R., et al., 1981: Mineralógia severnej časti Slanských vrchov. Min.Slovaca, Monografia 2, 98s
    UK
     
    • Northern Ireland
      • Co. Antrim
        • Ballyclare
    		Mineralogical Magazine 1962 33 : 187-201.
    Trevor Boyd collection
        • Ballymena
    		S. Moreton, unpublished observation.
    P Haas collection
        • Belfast
    		Trevor Boyd collection
        • Broughshane
    		Trevor Boyd Collection
        • Glenoe
    		Henmi C, Kusachi I, Henmi K, Sabine P A, Young B R (1973) A new mineral bicchulite, the natural analogue of gehlenite hydrate, from Fuka, Okayama Prefecture, Japan and Carneal, County Antrim, Northern Ireland, Mineralogical Journal, 7, 243-251
        • Squire's Hill
    		Mineralogical Magazine 1962 33 : 173-186.
    • Scotland
      • North West Highlands (Inverness-shire)
        • Isle of Skye
          • Duirinish
            • Dunvegan
    		[UKJMM 16:21-27]
          • Dunvegan
    		 http://www.picus.co.uk/managed/bms/bmscollection1501-2000.htm
          • Minginish
            • Carbost
              • Talisker
    		[Specimen in the Natural History Museum, London]
          • Trotternish
    		BMS Database
    [Specimen in the Natural History Museum, London]
    [Clark, 1993 - "Hey's Mineral Index"]
      • Strathclyde (Argyllshire)
        • Isle of Mull
    		Mineralogical Magazine 1965 34 : 92-106.
    [Specimen in the Natural History Museum, London]; Dana 6:569
    Ukraine
     
    • Crimea Oblast'
      • Crimea peninsula
        • Bakhchisaray area
          • Trudolyubovka Village
    		Karpenko V., Ignatenko K. Babingtonite form the Pervomaiskii quarry in the Crimea // Novye dannye o mineralakh (New Data on Minerals), 1991, #37, 58 - 63 (in Russ.) Getling R.V. Datolith of the Bodrak area in the Crimea and some features of his genesis // ZVMO, 1960, vol. 89, #1, 102 - 106 (in Russ.)
    USA
     
    • Arizona
      • Cochise Co.
        • Tombstone Hills
          • Tombstone District
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 242.
      • Maricopa Co.
        • Phoenix
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 242; Shannon, D.M. (1983b), Zeolites and associated minerals from Horseshoe Dam, AZ, Min.Rec.: 14: 115-117.
    • California
      • Los Angeles Co.
        • Santa Monica Mts
    		DeVito, F 1988 Self-guided field trip, Santa Monica Mountains, Los Angeles County. Bull. Min. Soc. So. Calif., Volume 58, Number 5, pafes6-7. ; DeVito, F. (1988) Self-guided field trip, Santa Monica Mountains, Los Angeles County. Bull. Min. Soc. So. Calif., Vo;ume 58, Number 5, pages 6-7.
      • Riverside Co.
        • Crestmore
    		Foshag, William Frederick (1924c), Centrallasite from Crestmore, California: American Mineralogist: 9: 88-90; Strunz, H. and Micheelsen, H. (1958) Calcum-phyllosilicate. Naturwissenschaften: 21: 515-516; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 477; micromounts@yahoogroups.com
      • San Francisco Co.
        • San Francisco
    		Schaller, Waldemar Theodore (1905b), Mineralogical notes: USGS Bulletin 262: 124, 126; Schaller, Waldemar Theodore (1911a), Mineralogical notes, series 1: USGS Bulletin 490: 103; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 445, 447; www.missourigeologists.org/Min-Loc1-2005.pdf.
      • Santa Clara Co.
        • Santa Cruz Mts
          • New Almaden District
            • New Almaden
              • Almaden Quicksilver County Park
    		Clarke, F.W. (1889), A new occurrence of gyrolite: USGS Bulletin 64: 22-23; […American Journal of Science, 3rd. series: 38: 128-129]: 22 (128-129); Bailey, Edgar H. & Donald L. Everhart (1964), Geology and quicksilver deposits of the New Almaden district, Santa Clara County, California: USGS PP 360: 102; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 478.
    • Idaho
      • Adams Co.
    		R&M 70:4 pp 242-263
      • Idaho Co.
    Tschernich, R. (1992): Zeolites of the World, 115
    • New Jersey
      • Hudson Co.
        • Secaucus
    		Minerals of Laurel Hill, Secaucus, NJ, Facciolla, N.W. (published privately).
    • North Carolina
      • Durham Co.
        • Durham
    		Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols; Kenny Gay message 15.09.2005; Mineralogical Magazine 1977 41 : 394-395
    • Oregon
      • Grant Co.
        • Kimberley
    		Tschernich, R. (1992): Zeolites of the World, 118
    Tschernich, R. (1992): Zeolites of the World, 69
        • North Fork John Day River
    		Micro Probe Volume VI Number 8
        • Ritter
    		Micro Probe Volume VII Number 8 Fall 1993
    Micro Probe Volume VII Number 8 Fall 1993
    Robert Simonoff
      • Linn Co.
        • Sweet Home
    		Micro Probe Volume VII Number 10 Fall 1994
      • Tillamook Co.
    		Micro Probe Volume VIII Number 2 Fall 1995
      • Wheeler Co.
        • Spray
    		Micro Probe Vol. 6 No. 4; Tschernich, R. (1992): Zeolites of the World, 118
    Micro Probe VolumeVII Number 3 Spring 1996
    Micro Probe Volume IX Number 2 Fall 2000
    • Utah
      • Salt Lake Co.
        • Oquirrh Mts
          • Bingham District (West Mountain District)
    		James R. Wilson (1995) A Collector's Guide to Rock, Mineral, & Fossil Localities of Utah UGS Miscellaneous Publication 95-4
    • Virginia
      • Fairfax Co.
    		ID by Tony Kampf
      • Loudoun Co.
        • Chantilly
    		Minerals of Virginia, 1990 by R. V. Dietrich
        • Conklin
    		Rocks & Min.:60:167.
      • Prince William Co.
        • Manassas
    		Minerals of Virginia, 1990 by R. V. Dietrich
    • Wyoming
      • Park Co.
    		Bargar, K.E.; Beeson, M.H. & Keith, T.E.C. (1981): Zeolites in Yellowstone National Park. Mineralogical Record 12, 29-38
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