Amazonite
KAlSi3O8 (Potassium Aluminum Silicate) - a variety of Microcline Feldspar
mineral
Category
Industrial Byproduct
Browse industrial byproduct specimens identified by the Rock Identifier community.
Quartzite
Quartzite (primarily 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
Anthracite Coal
Anthracite (Carbon Content 86–97%)
metamorphic
Moonstone
Orthoclase Feldspar (specifically showing adularescence)
Mineral
Red Jasper
Silicon Dioxide with Iron inclusions (SiO2 + Fe2O3)
sedimentary
Watermelon Tourmaline in Quartz Matrix
Elbaite (complex Borosilicate) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
mineral
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
mineral
Red Jasper (Opaque Chalcedony)
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
mineral
White Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Fluorite (likely Green Fluorite variant)
Calcium Fluoride (CaF2)
mineral
Garnet Beads
Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)
Mineral
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Desert Rose
Selenite Rose (Gypsum: CaSO4·2H2O)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Kyanite (within Quartz)
Kyanite (Al2SiO5) in crystalline Quartz base (SiO2)
metamorphic
Schist with Schorl (Black Tourmaline)
NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)
metamorphic
Kyanite (in Schist Matrix)
Kyanite (Al2SiO5)
metamorphic
Chert (Basanite / Flint)
Microcrystalline silica (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
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
Sandstone
Sandstone (clastic sedimentary rock)
Rock
Epidote
Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
Mineral
Green Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Blue Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Stilbite
Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O)
mineral
Sodalite
Sodalite: Na8(Al6Si6O24)Cl2
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
Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Milky Quartz (Tumbled)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble (Milky and Gray)
Quartz (Silicon Dioxide, SiO2)
mineral
Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)
Calcite
Mineral
Amazonite
KAlSi3O8 (Potassium Feldspar, variety of Microcline)
Mineral
Magnetite
Magnetite (Fe3O4)
Mineral
Sapphire (Corundum)
Corundum (Al2O3), variety Sapphire
Mineral
Schist
Schist (various compositions)
metamorphic