Galena (group) —
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Alabandite , Niningerite , Altaite , Galena , Clausthalite , Oldhamite
0
4
1
SXES
Group
Gallium arsenide GaAs
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—
Open
A crystal of gallium arsenide
(C) 2007 W. Oelen (via Wikimedia Commons). CC-BY-SA-3.0
2
2
3
SXES
Synthetic , Compound, Arsenide
Gallium nitride GaN
—
—
Open
Monocrystal of gallium nitride
Photo by Opto-p , Public Domain
0
7
0
CL/SEM
Synthetic , Compound, Nitride
Gallium orthophosphate GaPO4
—
—
0
2
0
PL/UV
Phosphate , Orthophosphate , Compound
Gallium oxyhydroxide GaOOH
—
—
0
4
0
IR
Hydroxide, Compound
Gallium phosphide GaP
—
—
Open
GaP wafer, one-side polished, S-doped n-type, sample length ~2 cm, thickness 0.430 mm
Photo by Materialscientist, CC BY-SA 4.0
0
1
0
CL/SEM
Compound, Synthetic
Garnet (FeII ,Mn,Ca)3 Al2 (SiO4 )3 , (FeII ,Mg)3 Al2 (SiO4 )3 , (Ca,FeII )3 Al2 (SiO4 )3 , X 3 Z 2 (SiO4 )3 , X =Mg,Ca,Fe,Mn, Z =Al,Fe,Cr,V
Nesosilicate Majorite , Almandine , Momoiite , Uvarovite , Knorringite , Grossular (var. Fe) , Skiagite , Menzerite-(Y) , Eringaite , Calderite , Goldmanite , Morimotoite , Andradite-Grossular (series) , Pyrope , Spessartine
Open
Garnet specimen from Idaho, USA
Photo by Chip Clark, via Smithsonian National Museum of Natural History
1
15
13
CL, EDS, Reflectance, SXES
Aluminosilicate , Silicate, Group
Garnierite —
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—
2
0
0
—
Informal
Gaspéite NiCO3
Calcite (group) , Minerals containing CO3 —
3
0
0
—
Carbonate , Mineral
Gearksutite CaAlF4 (OH)·H2 O
Minerals containing H2O , Minerals containing OH —
Open
Gearksutite (white) on creedite (orange), from Navidad Mine, Abasolo, Rodeo, Municipio de Rodeo, Durango, Mexico
Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
0
4
0
PL, PL/XL
Hydroxide , Mineral, Hydrated
Gehlenite Ca2 Al(SiAl)O7
Åkermanite-Gehlenite (series) —
Open
Sharp crystals of gehlenite to 6mm, from Monzoni Mts, Fassa Valley, Trento Province, Trentino-Alto Adige, Italy
Photo by Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
0
1
0
IR
Mineral, Aluminosilicate
Geikielite MgTiO3
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—
Open
Geikielite from Maxwell quarry, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
0
11
0
Raman
Mineral, Titanate
Germanium Ge
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—
Open
12 grams pf polycrystalline germanium, 2x3 cm.
(C) 2009 Jurii (via Wikimedia Commons, and images-of-elements.com). CC-BY-3.0
1
6
2
SXES
Metal , Element
Gibbsite Al(OH)3
Minerals containing OH —
Open
Botryoidal aggregates of greenish-gray gibbsite, to 0.3 cm across. From Xianghualing Mine, Xianghualing Sn-polymetallic ore field, Linwu County, Chenzhou Prefecture, Hunan Province, China
(C) Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
1
11
0
IR, PL, Reflectance
Mineral, Hydroxide
Glass SiO2
REE glass Melt , REE glass , Tachylite
Open
1st century CE Julio-Claudian roman glass cup, signed by Ennion.
Public Domain image courtesy of The Metropolitan Museum of Art, New York, USA.
0
87
15
CL, CL/SEM
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