Grossular : CSIRO Spectroscopy Database

Grossular [ Ca₃Al₂(SiO₄)₃ ]

Images of Grossular

CL spectrum of Grossular [Ca3Al2(SiO4)3] from Bangladesh, measured July 2023, in map 'Guide 2-1 0009-3 Non-mag'

OpticalFit spectrum plot by A. Torpy. (C) 2023 CSIRO Mineral Resources

Specimen of grossular, from Khalola hill near Sassi, Gilgit- Baltistan, Pakistan. Specimen M 38031, Museums Victoria.

Photo by John Bosworth, Copyright Museums Victoria / CC BY (Licensed as Attribution 4.0 International)

CL spectrum of Grossular from the Tista River, Bangladesh

Material properties

Formulas	Ca₃Al₂(SiO₄)₃, Ca₃(Al,Fe^III)₂(SiO₄)₃
Abbreviation	Grs
IMA Status	Approved (IMA 1962 s.p.)
Crystal symmetry	Cubic, Point group m3m, Space group Ia3d (#230)
Classifications	Minerals containing SiO4, Garnet, Andradite-Grossular (series)
Member	Hydrogrossular
Variants	Fe, Fe3+
Luminescence emitters	Mn, Unspecified
Spectra	Luminescence (2)
Search other databases	webmineral.com, mindat.org, rruf.info, mineralienatlas.de, Handbook of Mineralogy, American Mineralogist Crystal Structure Database
Tags	Aluminosilicate, Mineral

Composition

Element	Atoms
O	12
Al	2
Si	3
Ca	3
Total:	20

References for Grossular

CSIRO R-2023-03 Bangladesh

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Torpy et al. 2020, luminescence

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Torpy et al. 2020, luminescence, other

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Specimens of Grossular

Name	Owner	Materials	Phase purity	Image	Spectra	Techniques
MES042 Grossular	CSIRO	Grossular (99.2%)	99.2	MES042 Grossular Image of Grossular [ Ca3Al2(SiO4)3 ] in specimen 'MES042 Grossular' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	0	—
46E3372 Andradite	CSIRO	Albite, Albite (var. Ca), Fluorapatite, Grossular (81.4%), Orthoclase, Quartz, Titanite	81.4	46E3372 Andradite Image of Grossular, Albite (var. Ca), Albite, Fluorapatite, Orthoclase, Quartz and Titanite in specimen '46E3372 Grossular' [CSIRO]. (C) 2025 CSIRO Mineral Resources. All rights reserved.	0	—
M1413 Garnet	CSIRO	Almandine, Clinochlore (var. Fe), Grossular (31.9%), Ilmenite, Muscovite-1M, Quartz	31.9	M1413 Garnet Image of specimen 'M1413 Garnet' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	0	—
MES013 Paragonite	CSIRO	Clinochlore (var. Fe), Grossular (var. Fe3+) (20.8%), Muscovite-2M1, Paragonite-2M1, Phlogopite-2M1, Quartz	20.8	MES013 Paragonite Image of Muscovite-2M1, Clinochlore (var. Fe), Grossular (var. Fe3+), Paragonite-2M1, Phlogopite-2M1 and Quartz in specimen 'MES013' [CSIRO]. (C) 2026 CSIRO Mineral Resources. All rights reserved.	0	—
M2086 Wollastonite	CSIRO	Calcite, Grossular (2.0%), Wollastonite, Wollastonite-1A	2.0	M2086 Wollastonite Image of specimen 'M2086 Wollastonite' [CSIRO], from Willsboro, Essex Co., NY, USA. (C) 2026 CSIRO Mineral Resources. All rights reserved.	1	Reflectance
M2168 Andalusite	CSIRO	Andalusite, Grossular (1.3%), Muscovite-2M1, Sillimanite	1.3	M2168 Andalusite Image of specimen 'M2168 Andalusite' [CSIRO]. (C) 2025 CSIRO Mineral Resources. All rights reserved.	0	—
Tista 2020 D4 Shaker	CSIRO	Albite, Allanite-(Ce), Amphibole, Andesine, Apatite, Augite, Biotite, Bytownite, Chlorite (var. Mg, Fe), Epidote, Garnet, Grossular, Ilmenite, Ilmenite (var. Mn), K feldspar, Kyanite, Monazite-(Ce), Muscovite, Oligoclase, Pyroxene, Quartz, Staurolite, Titanite, Titanohematite, Xenotime-(Y), Zircon, Zoisite	—	Tista 2020 D4 Shaker Clustered phase map of river sands (D4 shaker), from the Tista River, Bangladesh. From Torpy et al. 2020 (C) 2020 CSIRO Mineral Resources	46	CL, EDS