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Grandidierite

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About GrandidieriteHide

Alfred Grandidier
Formula:
(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
Colour:
Bluish green, greenish blue
Lustre:
Vitreous, Pearly
Hardness:
Specific Gravity:
2.98 - 2.99
Crystal System:
Orthorhombic
Name:
Named by A. Lacroix in 1902 in honor of Alfred Grandidier (20 December 1836, Paris, France - 13 September 1912, Paris, France), French explorer and naturalist. He visited Madagascar three times between 1865-1870, crossing the island three times. With others, he wrote L'Histoire physique, naturelle et politique de Madagascar, a work spanning 40 volumes.
The Mg analogue of Ominelite. Chemically close to kornerupine.

Visit gemdat.org for gemological information about Grandidierite.


Classification of GrandidieriteHide

Approved, 'Grandfathered' (first described prior to 1959)
First Published:
1902
9.AJ.05

9 : SILICATES (Germanates)
A : Nesosilicates
J : Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4
54.1.1.1

54 : NESOSILICATES Borosilicates and Some Beryllosilicates
1 : Borosilicates and Some Beryllosilicates with (BO3)
17.5.49

17 : Silicates Containing other Anions
5 : Borosilicates

Physical Properties of GrandidieriteHide

Vitreous, Pearly
Transparency:
Transparent, Translucent
Comment:
Somewhat pearly on cleavage
Colour:
Bluish green, greenish blue
Comment:
Increasingly greener with greater Fe content; colourless to blue or green in thin section
Hardness:
7½ on Mohs scale
Cleavage:
Perfect
more perfect {100}, and {010}
Density:
2.98 - 2.99 g/cm3 (Measured)    3.00 g/cm3 (Calculated)

Optical Data of GrandidieriteHide

Type:
Biaxial (-)
RI values:
nα = 1.590 - 1.602 nβ = 1.618 - 1.636 nγ = 1.623 - 1.639
2V:
Measured: 24° to 32°, Calculated: 32°
Max Birefringence:
δ = 0.033 - 0.037
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
very strong (r < v)
Pleochroism:
Visible
Comments:
X= beep blue to blue green
Y= colorless
Z= light greenish blue to deep green
Comments:
Orientation: X=a, Y=b, Z=c; absorption: Z>X>Y

Chemical Properties of GrandidieriteHide

Formula:
(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
IMA Formula:
MgAl3O2(BO3)(SiO4)
Common Impurities:
Ti,Mn,Na,K

Crystallography of GrandidieriteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 10.335(2) Å, b = 10.978(2) Å, c = 5.760(2) Å
Ratio:
a:b:c = 0.941 : 1 : 0.525
Unit Cell V:
653.52 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Anhedral elongated individuals to 8cm; usually strongly corroded
Comment:
Pbnm space group

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacingIntensity
5.17 (vvs)
5.04 (vvs)
5.482 (vs)
2.744 (vs)
2.166 (s)
3.708 (ms)
2.584 (ms)

Type Occurrence of GrandidieriteHide

General Appearance of Type Material:
Bluish green masses up to several centimeters across, in quartz
Place of Conservation of Type Material:
Harvard University, Cambridge, Massachusetts, USA, registration no. 86382
Geological Setting of Type Material:
Pegmatite cross-cuts migmatitic high-grade granulite-facies metapelite gneisses and leptynites
Associated Minerals at Type Locality:
Reference:
Lacroix A (1902) Note préliminaire sur une nouvelle espèce minérale. Bulletin de la Société Française de Minéralogie: 25: 85-86

Other Language Names for GrandidieriteHide

Common AssociatesHide

Albite-Anorthite SeriesFeldspar Group.
AndalusiteAl2(SiO4)O
BiotiteA series or subgroup of the Mica Group.
Cordierite(Mg,Fe)2Al3(AlSi5O18)
CorundumAl2O3
Garnet GroupX3Z2(SiO4)3
Hypersthene(Mg,Fe)SiO3
K FeldsparPotassium-dominant feldspars with unknown crystal symmetry and Al-Si ordering state.
KornerupineMg3Al6(Si,Al,B)5O21(OH)
QuartzSiO2
SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]
SillimaniteAl2(SiO4)O
SinhaliteMgAl(BO4)
SpinelMgAl2O4
TourmalineA(D3)G6(T6O18)(BO3)3X3Z
Associated Minerals Based on Photo Data:
Phlogopite2 photos of Grandidierite associated with Phlogopite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.AJ.Hingganite-(Nd)(Nd,Y,Ce,Sm)2(◻,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/b
9.AJ.05Ominelite(Fe2+,Mg)(Al,Fe3+)3(SiO4)(BO3)O2Orth. mmm (2/m 2/m 2/m)
9.AJ.10Dumortierite(Al,Fe3+)7(SiO4)3(BO3)O3Orth. mmm (2/m 2/m 2/m)
9.AJ.10Holtite(Ta0.60.4)Al6BSi3O18(O,OH)2.25Orth. mmm (2/m 2/m 2/m) : Pnma
9.AJ.10Magnesiodumortierite(Mg,Ti,◻(Al,Mg)2Al4Si3O18-y(OH)yB y = 2-3Orth.
9.AJ.15GarrelsiteBa3NaSi2B7O16(OH)4Mon.
9.AJ.20BakeriteCa4(H5B5Si3O20)Mon. 2/m : P21/b
9.AJ.20DatoliteCaB(SiO4)(OH)Mon. 2/m : P21/b
9.AJ.20Gadolinite-(Ce)(Ce,La,Nd,Y)2Fe2+Be2Si2O10Mon. 2/m
9.AJ.20Gadolinite-(Y)Y2Fe2+Be2Si2O10Mon. 2/m : P21/b
9.AJ.20Hingganite-(Ce)(Ce,REE)2(□,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/b
9.AJ.20Hingganite-(Y)(Y,REE,Ca)2(□,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/b
9.AJ.20Hingganite-(Yb)(Yb,Y,REE)2□Be2[SiO4]2(OH)2
9.AJ.20HomiliteCa2(Fe2+,Mg)B2Si2O10Mon. 2/m : P21/b
9.AJ.20Melanocerite-(Ce)(Ce,Ca)5(SiO4,BO4)3(OH,0)Hex.
9.AJ.20Minasgeraisite-(Y)BiCa(Y,Ln)2(□,Mn)2(Be,B,Si)4Si4O16 [(OH),O]4Tric. 1 : P1
9.AJ.20Calcybeborosilite-(Y)(Y,Ca)2(□,Fe2+)(B,Be)2[SiO4]2(OH,O)2Mon.
9.AJ.25Stillwellite-(Ce)(Ce,La,Ca)BSiO5
9.AJ.30Cappelenite-(Y)Ba(Y,Ce)6Si3B6O24F2Trig. 3 : P3
9.AJ.35Okanoganite-(Y)(Na,Ca)3(Y,Ce)12Si6B2O27F14
9.AJ.35Vicanite-(Ce)(Ca,Ce,La,Th)15As5+(As3+0.5,Na0.5)Fe3+Si6B4O40F7Trig.
9.AJ.35Hundholmenite-(Y)(Y,REE,Ca,Na)15(Al,Fe3+)(CaxAs3+1-x)(Si,As5+)Si6B3(O,F)48Trig. 3m : R3m
9.AJ.35Proshchenkoite-(Y)Ca(Y,REE,Ca,Na,Mn)15Fe2+(P,Si)Si6B3O34F14Trig. 3m : R3m
9.AJ.40JadariteLiNaSiB3O7(OH)Mon. 2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.5.1ManandoniteLi2Al4(Si2AlB)O10(OH)8Orth.
17.5.2ReedmergneriteNaBSi3O8Tric.
17.5.3SearlesiteNa(H2BSi2O7)Mon. 2 : P21
17.5.4OleniteNa(Al3)Al6(Si6O18)(BO3)3O3(OH)Trig.
17.5.5ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.6KalborsiteK6Al4BSi6O20(OH)4ClTet.
17.5.7BoromuscoviteKAl2(BSi3O10)(OH)2Mon.
17.5.8PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
17.5.9LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.10DatoliteCaB(SiO4)(OH)Mon. 2/m : P21/b
17.5.11DanburiteCaB2Si2O8Orth. mmm (2/m 2/m 2/m)
17.5.12HowliteCa2B5SiO9(OH)5Mon. 2/m : P21/b
17.5.13BakeriteCa4(H5B5Si3O20)Mon. 2/m : P21/b
17.5.14OyeliteCa10Si8B2O29 · 12.5H2OOrth.
17.5.15KornerupineMg3Al6(Si,Al,B)5O21(OH)Orth. mmm (2/m 2/m 2/m)
17.5.16HarkeriteCa12Mg4Al(BO3)3(SiO4)4(CO3)5 · H2OTrig. 3m (3 2/m) : R3m
17.5.17SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]Tric. 1 : P1
17.5.18Stillwellite-(Ce)(Ce,La,Ca)BSiO5
17.5.19Tadzhikite-(Ce)Ca4Ce3+2Ti◻(B4Si4O22)(OH)2Mon.
17.5.20Melanocerite-(Ce)(Ce,Ca)5(SiO4,BO4)3(OH,0)Hex.
17.5.21Okanoganite-(Y)(Na,Ca)3(Y,Ce)12Si6B2O27F14
17.5.22Tritomite-(Ce)Ce5(SiO4,BO4)3(OH,O)
17.5.23Tritomite-(Y)Y5(SiO4,BO4)3(O,OH,F)
17.5.24Cappelenite-(Y)Ba(Y,Ce)6Si3B6O24F2Trig. 3 : P3
17.5.25Dumortierite(Al,Fe3+)7(SiO4)3(BO3)O3Orth. mmm (2/m 2/m 2/m)
17.5.26Holtite(Ta0.60.4)Al6BSi3O18(O,OH)2.25Orth. mmm (2/m 2/m 2/m) : Pnma
17.5.27DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.28 FerridraviteNaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3O
17.5.29Axinite-(Mg)Ca2MgAl2BSi4O15OHTric.
17.5.30Uvite SeriesCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)Trig. 3m : R3m
17.5.31GarrelsiteBa3NaSi2B7O16(OH)4Mon.
17.5.32TienshaniteKNa3Na6Ca2Ba6Mn6(Ti4+,Nb)6B12Si36O114(O,OH,F)11Hex. 6/m : P6/m
17.5.33LeucospheniteBaNa4Ti2B2Si10O30Mon.
17.5.34TaramelliteBa4(Fe3+,Ti,Fe2+,Mg)4(B2Si8O27)O2ClxOrth. mmm (2/m 2/m 2/m) : Pmmn
17.5.35TitantaramelliteBa4(Ti,Fe3+,Fe2+,Mg)4(B2Si8O27)O2ClxOrth.
17.5.36NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2ClOrth. mmm (2/m 2/m 2/m) : Pmmn
17.5.37Chromium-draviteNa(Mg3)Cr3+6(Si6O18)(BO3)3(OH)3(OH)Trig.
17.5.38WawayandaiteCa6Mn2BBe9Si6O23(OH,Cl)15Mon.
17.5.39Werdingite(Mg,Fe)2Al14Si4B4O37Tric.
17.5.40Axinite-(Mn)Ca2Mn2+Al2BSi4O15(OH)Tric. 1 : P1
17.5.41AxiniteTric.
17.5.42TinzeniteCa2Mn2+4Al4[B2Si8O30](OH)2Tric.
17.5.44SchorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.45Fluor-buergeriteNa(Fe3+3)Al6(Si6O18)(BO3)3O3FTrig. 3m : R3m
17.5.46FeruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.47Axinite-(Fe)Ca2Fe2+Al2BSi4O15OHTric. 1 : P1
17.5.48HomiliteCa2(Fe2+,Mg)B2Si2O10Mon. 2/m : P21/b
17.5.50Hyalotekite(Pb,Ba,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28(F,Cl)Tric. 1 : P1
17.5.51Hellandite-(Y)(Ca,REE)4Y2Al◻2(B4Si4O22) (OH)2Mon.

Other InformationHide

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

References for GrandidieriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Lacroix, A. (1902) Note préliminaire sur une nouvelle espèce minérale. Bulletin de la Société Française de Minéralogie: 25: 85-86.
Lacroix, A. (1922) Min. de Madagascar, 1, 393.
McKie, D. (1965) The magnesium aluminium borosilicates: kornerupine and grandidierite. Mineralogical Magazine, vol. 34, n°268, 346-357.
Stephenson, D.A. and Moore, P.B. (1968) The crystal structure of grandidierite, (Mg,Fe)Al3SiBO9. Acta Crystallographica: B24: 1518-1522.
Zav'yalova, I.V., Vartanova, N.S., Arkhipenko, D.K., Grigor'yeva, T.N., and Solotchina, E.P. (1975) A find of grandidierite in western Transbaikaliya. Dokl. Akad. Nauk. SSSR 213, 140-142.
Grew, E.S. (1983) A grandidierite-sapphirine association from India. Mineralogical Magazine, vol. 47, n° 344, 401-403.
Nicollet, C. (1990) Occurrences of grandidierite, serendibite and tourmaline near Ihosy, southern Madagascar. Mineralogical Magazine, vol. 54, n° 374, 131-133.
Niven, M.L., Waters, D.J., and Moore, J.M. (1991) The crystal structure of werdingite, (Mg,Fe)2Al12(Al,Fe)2Si4(B,Al)4O37, and its relationship to sillimanite, mullite, and grandidierite. American Mineralogist: 76: 246-256.
Carson, C.J., Hand, M., and Dirks, P.H.G.M. (1995) Stable coexistence of grandidierite and kornerupine during medium pressure granulite facies metamorphism. Mineralogical Magazine: 59: 327. https://rruff.info/doclib/MinMag/Volume_59/59-395-327.pdf
Grew, E.S. and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
MacKenzie, K. J. and Meinhold, R. H. (1997) MAS NMR study of pentacoordinated magnesium in grandidierite. American Mineralogist, 82(5-6), 479-482. http://www.minsocam.org/MSA/AmMin/toc/Articles_Free/1997/MacKenzie_p479-482_97.pdf
Dzikowski, T.J., Groat, L.A., and Grew, E.S. (2007) The geometric effects of vFe2+ for vMg substitution on the crystal structures of the grandidierite-ominelite series. American Mineralogist: 92: 863-872.
Cempírek, J., Novák, M., Dolníček, Z., Kotková, J., and Škoda, R. (2010) Crystal chemistry and origin of grandidierite, ominelite, boralsilite, and werdingite from the Bory Granulite Massif, Czech Republic. American Mineralogist, 95(10), 1533-1547. https://www.researchgate.net/profile/Jan_Cempirek/publication/234833623_Crystal_chemistry_and_origin_of_grandidierite_ominelite_boralsilite_and_werdingite_from_the_Bory_Granulite_Massif_Czech_Republic/links/55b7813d08aed621de046460.pdf
Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C., Eds. (2016) Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/

Internet Links for GrandidieriteHide

Localities for GrandidieriteHide

ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Algeria
 
  • Béjaïa Province
Anthony, J.W., Bideaux, R.A., Bladh, K.W. and Nichols, M.C., Eds. Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/ (2016); van Bergen, M.J. (1980): Grandidierite from aluminous metasedimentary xenoliths within acid volcanics, a first record in Italy. Mineralogical Magazine: 43: 651-658
Antarctica
 
  • Eastern Antarctica
    • Princess Elizabeth Land
      • Ingrid Christensen Coast
        • Prydz Bay
Maas, R., Grew, E. S., & Carson, C. J. (2015). Isotopic Constraints (Pb, Rb-Sr, Sm-Nd) on the Sources of Early Cambrian Pegmatites with Boron and Beryllium Minerals in the Larsemann Hills, Prydz Bay, Antarctica. The Canadian Mineralogist, 53:249-272
C. J. Carson, M. Hand and P. H. G. M. Dirks (1995) Stable coexistence of grandidierite and kornerupine during medium pressure granulite facies metamorphism. Mineralogical Magazine 59:327-339
C. J. Carson, M. Hand and P. H. G. M. Dirks (1995) Stable coexistence of grandidierite and kornerupine during medium pressure granulite facies metamorphism. Mineralogical Magazine 59:327-339
            • Stornes Peninsula
Grew, E.S., Armbruster, T., Medenbach, O., Yates, M.G., Carson, C.J. (2006): Tassieite, (Na,◻)Ca2(Mg,Fe2+,Fe3+)2(Fe3+,Mg)2(Fe2+,Mg)2(PO4)6•2H2O, a hydrothermal wicksite-group mineral in fluorapatite nodules from granulite-facies paragneiss in the Larsemann Hills, Prydz Bay, East Antarctica. Canadian Mineralogist, 45, 293-305(2007).
Australia
 
  • Northern Territory
    • Central Desert Region
Am Min 93:283-299
Canada
 
  • Ontario
    • Leeds and Grenville Co.
Lonker, S. (1980): Can. J. Earth Sci.: 17: 1666-1684 (vide: Grew, E.S. (1983): A grandidierite-sapphirine association from India. Mineralogical Magazine: 47: 401-403)
Lonker, S. (1980) Canadian Journal of Earth Science: 17: 1666-1684.; Grew, E.S. (1983) A grandidierite-sapphirine association from India. Mineralogical Magazine, vol. 47, n° 344, 401-403.
Czech Republic
 
  • Vysočina Region
    • Žďár nad Sázavou District
      • Křižanov
CEMPÍREK, Jan a Milan NOVÁK a Zdeněk DOLNÍČEK a Jana KOTKOVÁ a Radek ŠKODA. Crystal chemistry and origin of grandidierite, ominelite, boralsilite, and werdingite from the Bory Granulite Massif, Czech Republic American Mineralogist, Mineralogical Society of America, 95, 10, od s. 1533-1547, 15 s. ISSN 0003-004X. 2010
Denmark
 
  • Greenland
    • Sermersooq
      • Nuuk (Godthåb)
Petersen, O. V. & Secher, K. (1993): The Minerals of Greenland. Mineralogical Record 24 (2): 1-67
Germany
 
  • Rhineland-Palatinate
    • Ahrweiler
      • Mayen
        • Ettringen
          • Bellerberg volcano
[Blass, G., Graf, H.W., Über neue Mineralien vom Bellerberg, Eifel Mineralien-Welt 5/6, 53, 1994] [A. Wittern: Mineralfundorte in Deutschland, Schweizerbart (Stuttgart), 2001]
    • Mayen-Koblenz
      • Andernach
        • Nickenich
Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag, München (2. Auflage), 1987
India
 
  • Andhra Pradesh
    • Visakhapatnam District
      • Eastern Ghats Belt
Grew, E.S. (1983) A grandidierite-sapphirine association from India. Mineralogical Magazine, vol. 47, n° 344, 401-403.
Italy
 
  • Latium
    • Rome Province
      • Alban Hills
        • Marino
van Bergen, M.J. (1980): Grandidierite from aluminous metasedimentary xenoliths within acid volcanics, a first record in Italy. Mineralogical Magazine: 43: 651-658; Anthony, J.W., Bideaux, R.A., Bladh, K.W. and Nichols, M.C., Eds. Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/ (2016)
  • Tuscany
    • Siena Province
van Bergen, M.J. (1980): Grandidierite from aluminous metasedimentary xenoliths within acid volcanics, a first record in Italy. Mineralogical Magazine: 43: 651-658; Anthony, J.W., Bideaux, R.A., Bladh, K.W. and Nichols, M.C., Eds. Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/ (2016)
Madagascar
 
  • Fianarantsoa Province
    • Ihorombe Region
      • Ihosy District
        • Ihosy Commune
Nicollet, C. (1990) Occurrences of grandidierite, serendibite and tourmaline near Ihosy, southern Madagascar. Mineralogical Magazine, vol. 54, n° 374, 131-133.
  • Tuléar Province (Toliara)
Jason Evans photo & specimen, photo Id 206685
von Knorring, 0., Sahama, T.G., and Lehtinen, M. (1969) A note on grandidierite from Fort Dauphin, Madagascar. Bull. Geol. Soc. Finl., 41: 71-74.
        • Behara Commune
Behier, J. (1960): Travaux mineralogiques. in Besaire,H. (ed): Rapport Annuel du Service Geologique pour 1960. Republique Malgache, 181-199 [p. 194]
        • Esira Commune
Behier, J. (1957): Travaux mineralogiques. Rapport Annuel du service géologique pour 1957. Republique Malgache. p. 293
        • Maromby Commune
          • Belafa area
McKie, D. (1965) The magnesium aluminium borosilicates: kornerupine and grandidierite. Mineralogical Magazine, vol. 34, n°268, 346-357
- http://www.musee.ensmp.fr/gm//33.html - Farges, F. (2001): Crystal chemistry of iron in natural grandidierites: an X-ray absorption fine-structure spectroscopy study. Journal Physics and Chemistry of Minerals. 28: 619-629
McKie, D. (1965) The magnesium aluminium borosilicates: kornerupine and grandidierite. Mineralogical Magazine, vol. 34, n°268, 346-357.; Black, P.M. (1970) Grandidierite from Cuvier Island, New Zealand. Mineralogical Magazine 37, n° 289, 615-617.
http://www.gia.edu/gems-gemology/fall-2016-new-deposit-gem-quality-grandidierite-madagascar
Vertriest, W., Stanislas, D., Sangsawong,S., Raynaud, V. and Vincent Pardieu (2015): Grandidierite from Madagascar. Gems & Gemology: 51 (4): 449
Bruyère, D., Delor, C., Raoul, J. A, Rakotondranaivo, R., Willie, G. Maubec & Lahfid, A. (2016) New Deposit of Gem-Quality Grandidierite in Madagascar. Gems & Gemology: 52 (3): 266-275
      • Betroka District
        • Mahasoa Est Commune
Vry, J.K., Brown, P. E., Valley, J. W. (1990): Cordierite volatile content and the role of CO2 in high-grade metamorphism. American Mineralogist. 75: 71-88
      • Taolañaro District (Fort Dauphin)
        • Analapatsy Commune
Lacroix, A. (1902): Note préliminaire sur une nouvelle espèce minerale. Bulletin de la Société Francaise de Minéralogie 25: 85-86 ;
        • Taolañaro Commune
          • Bezavona Massif
            • Ampamatoa
Behier, J. (1960): Contribution á la Minéralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive, p.40
Malawi
 
  • Mchinji District
Haslam, H.W. (1980): Grandidierite from a metamorphic aureole near Mchinji, Malawi. Mineralogical Magazine: 43: 822-823
Namibia
 
  • Erongo Region
    • Arandis
      • Cape Cross area
Bonardo, L., Fraccaro, G., Ciriotti, M.E., Blass, G., Ambrino, P. (2008). Primo ritrovamento di grandidierite in Namibia. Micro (notizie mineralogiche), 2/2008, 129-131.
New Zealand
 
  • North Island
    • Waikato Region
      • Thames-Coromandel District
Black, P.M. (1970) Grandidierite from Cuvier Island, New Zealand. Mineralogical Magazine, Vol. 37, No. 289, 615-617. Anthony, J.W., Bideaux, R.A., Bladh, K.W., Nichols, M.C., Eds. (2016) Handbook of Mineralogy. Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/
Norway
 
  • Aust-Agder
    • Froland
Nijland, T.G., Zwaan, J.C & Touret, L. (1998): Topograpical mineralogy of the Bamble sector, south Norway. Scripta Geologica 118, 46 pp
  • Nordland
    • Hinnøya
      • Lødingen
Krogh, E. (1975): Contributions to the mineralogy of Norway, No 59. The first occurrence of grandidierite in Norway. Norsk Geologisk Tidsskrift, 55: 77-80
  • Rogaland
    • Lund
      • Flatestøl
Grew, E. S. et al. (1998): Werdingite, a borosilicate new to granitic pegmatites, The Canadian Mineralogist 36, 399-414
Slovakia
 
  • Banská Bystrica Region
    • Brezno Co.
Hlawatsch, K. (1918): Über ein Vorkommen von Grandidierit bei Helpa im Komitat Gömör. Föld. Közlöny, 48, 329-330.; Koděra, M. et al., 1986 a 1990: Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
South Africa
 
  • KwaZulu-Natal Province
    • Ugu District
De Villiers, J.E. (1940) Iron-rich kornerupine from Port Shepstone, Natal. Mineralogical Magazine, vol. 25, n° 169, 550-556.
  • Northern Cape Province
    • Namakwa District (Namaqualand)
      • Gordonia District
Minerals of South Africa; Moore, J. M., Waters, D. J., & Niven, M. L. (1990). Werdingite, a new borosilicate mineral from the granulite facies of the western Namaqualand metamorphic complex, South Africa. American Mineralogist, 75(3-4), 415-420.
      • Okiep Copper District
Hokada, T., Motoyoshi, Y., Hiroi, Y., Shimura, T., Yuhara, M., Shiraishi, K., ... & Knoper, M. W. (2001). Petrography and mineral chemistry of high-grade pelitic gneisses and related rocks from Namaqualand, South Africa. Memoirs of National Institute of Polar Research. Special issue, 55, 105-126.
Suriname
AmMin 61:332
  • Nickerie District
De Roever, E.W.F. and Kieft, C. (1976) Grandidierite of contact-metamorphic origin from Maratakka, northwest Surinam. American Mineralogist, vol. 61, 332-333.
UK
 
  • Scotland
Gribble, C.D. (1968) Contrib. Mineral. Petrol. 17, 315-30.; R. K. Herd et al. (1984) Mineral. Mag. 48, 401-6.; Ryback, G., Nawaz, R. and Farley, E. (1988) Seventh Supplementary List of British Isles Minerals (Irish). Mineralogical Magazine, vol. 52, n° 365, pp. 267-274.
    • Perth and Kinross
      • Comrie
Livingstone, A. and Macpherson, H.G. (1983) Fifth supplementary list of British minerals (Scottish). Mineralogical Magazine, vol. 47, n° 342, p. 99-105.; Helmers, H., & Lustenhouwer, W. J. (1988). Grandidierite from the Comrie aureole. Scottish Journal of Geology, 24(3), 245-248.
USA
 
  • New York
    • St. Lawrence Co.
      • Russell Township
Grew, E.S., Yates, M.G. and deLorraine, W. (1990) Serendibite from the Northwest Adirondack Lowlands, in Russell, New York, USA. Mineralogical Magazine, vol. 54, n° 374, pp. 133-136.
    • Warren Co.
Anthony, J.W., Bideaux, R.A., Bladh, K.W. and Nichols, M.C., Eds. Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/ (2016)
  • Wyoming
    • Albany Co.
AmMin 87:160
Zimbabwe
 
  • Mashonaland West
    • Karoi District (Urungwe; Hurungwe District)
Grew, E. S., Yates, M. G., Shearer, C. K., & Wiedenbeck, M. (1997). Werdingite from the Urungwe district, Zimbabwe. Mineralogical Magazine, 61(5), 713-718.
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