Gadolinium oxide Gd2 O3
REE oxide —
9
1
CL/SEM
REE, Simple oxide , Compound
Gadolinium ultraphosphate GdP5 O14
REE ultraphosphate —
13
2
CL/SEM, SXES
REE, Phosphate , Synthetic , Compound , Ultraphosphate
Gagarinite-(Y) NaCaYF6
REE fluoride —
Open
Brick-red sample of gagarinite-(Y), showing crystalline shape, embeded in cryolite and sugar fluoraluminates like thomsenolite or gearksutite, from Katugin, Chitinskaya Oblast', Transbaikalia, Eastern Siberia, Russian Federation
©
Photo by Joan Rosell, from rosellminerals.com, CC-BY-SA 4.0
15
1
CL/SEM
Mineral , REE, Halide
Gahnite ZnAl2 O4
Spinel (subgroup) —
Open
Gahnite specimen from Ben Murphy Mica-Beryl Mine, Scaggsville, Howard Co., MD, USA
©
Photo by Ken Larsen, via Smithsonian National Museum of Natural History
1
0
PL/XL
Mineral
Galena PbS
Galena (group) , Lead sulphide —
Open
Galena on quartz, from Krushev dol deposit, Madan ore field, Rhodope Mts, Smolyan Oblast, Bulgaria. Size: 7.1 x 5.4 x 4.1 cm.
©
Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
2
1
SXES
Mineral, Sulphide
Gallium arsenide GaAs
—
—
Open
A crystal of gallium arsenide
©
(C) 2007 W. Oelen (via Wikimedia Commons). CC-BY-SA-3.0
2
3
SXES
Synthetic , Compound, Arsenide
Gallium nitride GaN
—
—
Open
Monocrystal of gallium nitride
©
Photo by Opto-p , Public Domain
7
0
CL/SEM
Synthetic , Compound, Nitride
Gallium orthophosphate GaPO4
—
—
2
0
PL/UV
Phosphate , Orthophosphate , Compound
Gallium oxyhydroxide GaOOH
—
—
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
1
0
CL/SEM
Compound, Synthetic
Garnet (FeII ,Mg)3 Al2 (SiO4 )3 , X 3 Z 2 (SiO4 )3 , X =Mg,Ca,Fe,Mn, Z =Al,Fe,Cr,V, Gd3 Ga5 O12 , (Ca,FeII )3 Al2 (SiO4 )3 , (FeII ,Mn,Ca)3 Al2 (SiO4 )3
Nesosilicate Pyrope , Goldmanite , Almandine , Uvarovite , Majorite , Menzerite-(Y) , Morimotoite , Spessartine , Grossular, Fe , Skiagite , Eringaite , Knorringite , Calderite , Momoiite , Andradite-Grossular (series)
Open
Garnet specimen from Idaho, USA
©
Photo by Chip Clark, via Smithsonian National Museum of Natural History
3
7
CL, EDS
Aluminosilicate , Silicate, Group
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
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
1
0
IR
Mineral, Aluminosilicate
Geikielite MgTiO3
—
—
Open
Geikielite from Maxwell quarry, Chelsea, Les Collines-de-l'Outaouais RCM, Outaouais, Québec, Canada
©
Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
11
0
Raman
Mineral, Titanate
Germanium Ge
—
—
Open
12 grams pf polycrystalline germanium, 2x3 cm.
©
(C) 2009 Jurii (via Wikimedia Commons, and images-of-elements.com). CC-BY-3.0
6
2
SXES
Metal , Element
