Kyanite (in Schist Matrix)
Kyanite (Al2SiO5)
metamorphic
Category
Industrial Byproduct
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Chert (Basanite / Flint)
Microcrystalline silica (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
Mineral
Blue Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Green Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Sodalite
Sodalite: Na8(Al6Si6O24)Cl2
mineral
Stilbite
Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O)
mineral
Red Jasper (possibly Wonderstone)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Blue Banded Agate (Dyed)
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Anthracite Coal
Anthracite (Carbon Content 86–97%)
metamorphic
Hypersthene
Hypersthene ((Mg,Fe)SiO₃)
Mineral
Larimar
Pectolite (a blue variety of Pectolite)
Mineral
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate) - a variety of Microcline Feldspar
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Jasper, Agate, Quartz Mix (Polished Beads)
SiO₂ (Silicon Dioxide) for Quartz. Jasper and Agate are cryptocrystalline varieties of Quartz.
Mineral/Semiprecious Gemstone (variety of Quartz)
Limonite (also known as Yellow Ochre or Brown Hematite)
Limonite (Hydrated iron oxide-hydroxide, FeO(OH)·nH2O)
Mineral
Moonstone
Orthoclase Feldspar (specifically showing adularescence)
Mineral
Sandstone
Sandstone (clastic sedimentary rock)
Rock
Epidote
Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
Mineral
Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz (Tumbled)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble (Milky and Gray)
Quartz (Silicon Dioxide, SiO2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Garnet (Red Garnet)
Garnet Group. The red varieties seen in jewelry are typically Almandine (Fe3Al2(SiO4)3), Pyrope (Mg3Al2(SiO4)3), or a mix of the two (pyrope-almandine series).
Mineral (specifically, a variety of the mineral species Pyrope-Almandine Garnet)
Quartzite
Quartzite (Primary mineral: Quartz, SiO2)
metamorphic
Schist
Schist (various compositions)
metamorphic
Corundum
Corundum (Al2O3)
Mineral
Emerald
Beryl (Be3Al2Si6O18), specifically the green variety colored by chromium or vanadium
Mineral (Gemstone variety of Beryl)
Amazonite
KAlSi3O8 (Potassium Feldspar, variety of Microcline)
Mineral
Magnetite
Magnetite (Fe3O4)
Mineral
Sapphire (Corundum)
Corundum (Al2O3), variety Sapphire
Mineral
Rough Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)
Calcite
Mineral
Opal
Hydrous silicon dioxide (SiO2·nH2O)
mineral
Emerald
Beryl (Be₃Al₂Si₆O₁₈), specifically the green variety colored by trace amounts of chromium or vanadium.
Mineral
Epidote
Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)
Mineral