Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
mineral
Category
Igneous Or Metamorphic
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Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcopyrite in Matrix
Chalcopyrite (CuFeS2)
mineral
Quartz (Gray/Smoky Varieties)
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Gneiss
Foliated Metamorphic Rock
metamorphic
Schist
Mica Schist
metamorphic
Quartz Vein / Quartzite Specimens
Silicon Dioxide (SiO2)
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Mica
Muscovite / Biotite (Phyllosilicate group)
mineral
Corundum (Sapphire/Ruby in Matrix)
Corundum (Al2O3)
mineral
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Muscovite
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Aventurine
Silicon Dioxide (SiO2) with inclusions
mineral
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Muscovite Mica
Muscovite: KAl2(AlSi3O10)(OH)2
mineral
Biotite Schist
Biotite Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Rhodonite
Rhodonite (MnSiO3)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Milky Quartz (Common Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Granite (with Almandine Garnet inclusions)
Granite composed primarily of Quartz (SiO2), K-Feldspar (KAlSi3O8), and Almandine Garnet (Fe3Al2(SiO4)3)
igneous
Greenstone / Greenschist
Chlorite schist / Epidiorite
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist (Foliated Metamorphic Rock)
metamorphic
Greenschist
Chlorite schist
metamorphic
Green Schist
Greenschist (Chlorite Schist)
metamorphic
Mica (Muscovite)
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Garnet
Garnet Group (e.g., Almandine Fe3Al2(SiO4)3 or Pyrope Mg3Al2(SiO4)3)
mineral
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Gneiss
Gneissic Metamorphic Rock
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Mineral (Variety of Quartz)
Pegmatite
Igneous Pegmatite
igneous
Phyllite (possibly low-grade greenish slate)
Foliated metamorphic rock composed mainly of very fine-grained quartz, mica, and chlorite; approximate composition varies and has no single fixed chemical formula
metamorphic
Greenschist
Greenschist (composed mainly of actinolite/tremolite, chlorite, and epidote)
metamorphic
Granite
Felsic intrusive igneous rock
igneous
Magnetite
Magnetite (Fe3O4)
mineral
Muscovite (Mica)
Muscovite - KAl2(AlSi3O10)(OH)2
Mineral
Garnet (specifically Almandine)
Almandine - Fe3Al2(SiO4)3
metamorphic
Biotite Schist
Metamorphic Rock (Schist)
metamorphic
Banded Gneiss Pebble
Gneiss (Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic