Chalcopyrite (Peacock Ore)
Chalcopyrite (CuFeS2)
mineral
Category
Metamorphic Or Igneous
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Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Sunstone
(Ca,Na)((Al,Si)2Si2)O8 (Plagioclase Feldspar)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
White Sapphire
Corundum (Al2O3)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Quartz Fragment
Silicon Dioxide (SiO2)
mineral
Smoky Quartz (Faceted Beads)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon dioxide (SiO2)
Mineral
Educational Geologic Collection
Mixed Mineral and Rock Collection (Various compositions)
mineral
Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)
Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Greenschist
Chlorite schist
metamorphic
River Pebble (Gneiss or Quartzite mixture)
Metamorphic rock (Commonly Gneissic)
metamorphic
Graphite
Graphite (Native Carbon), Formula: C
Metamorphic
Ruby (Raw Corundum)
Corundum (Al2O3) with Chromium traces
mineral
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2 (Tremolite-Actinolite series)
metamorphic
Garnet Beads
Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)
Mineral
Pyrite
Iron Pyrite (FeS2)
Mineral
Gneiss
Gneiss (Metamorphic rock)
metamorphic
Sodalite in Quartz
Na8(Al6Si6O24)Cl2 (Sodalite) / SiO2 (Quartz)
metamorphic
Greenschist
Greenschist
metamorphic
Biotite Schist
Biotite Gneiss/Schist (approximate formula K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Epidote
Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Quartzite River Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Milky Quartz in Epidote Host Rock
Crystalline Silicon Dioxide (SiO2) with Epidote Ca2(Al,Fe)3(SiO4)3(OH)
mineral
Epidote
Calcium aluminum iron silicate (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Epidotite (Unakite-related Epidote)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Gneiss (Augen Gneiss)
Augen Gneiss
metamorphic
Ruby Zoisite
Anyolite (Calcium aluminium silicate with Chromium/Corundum inclusions)
metamorphic
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
Magnetite
Magnetite (Fe3O4)
mineral
Muscovite Mica
Muscovite: KAl2(AlSi3O10)(OH)2
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
gemstone
Milky Quartz
Silicon Dioxide (SiO2)
mineral