Pearl (nacre)
Calcium Carbonate (mostly CaCO3 as Aragonite) and Conchiolin
Organic Mineraloid
Category
Mineral (Specifically A Mineraloid)
Browse mineral (specifically a mineraloid) specimens identified by the Rock Identifier community.
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Labradorite
Labradorite ((Ca,Na)(Al,Si)4O8)
mineral
Stromatolite
Stromatolite (Cyanobacteria-formed Organo-sedimentary structure)
sedimentary
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2) with Limonite/Goethite
mineral
Rose Quartz
Quartz (SiO₂), specifically a variety of Quartz
Mineral
Moss Agate
Chalcedony (Silicon Dioxide / SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Yellow Diamond (Faceted)
Diamond (C - Pure Carbon)
mineral
Blue Lace Agate
Chalcedony (SiO2) with trace minerals
mineral
Amazonite
Potassium Feldspar (KAlSi3O8)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Pink Granite
Felsic Plutonic Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)
Igneous
Blue Apatite
Apatite group (Ca5(PO4)3(F,Cl,OH))
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxide
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Greenschist
Greenschist (chlorite-epidote schist)
metamorphic
Jasper (likely Polychrome or Desert Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary (chemically precipitated mineral)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Bloodstone (Heliotrope)
Chalcedony (SiO2) with inclusions of Iron Oxide or Red Jasper
mineral
Mahogany Obsidian
Obsidian (Volcanic Glass) with Hematite or Magnetite inclusions, SiO2 (Silicon Dioxide)
igneous
Bumble Bee Jasper
Calcite-bearing Volcanic Tuff (not a true Jasper)
sedimentary
Granite Pegmatite
Phaneritic Plutonic Igneous Rock
igneous
Pink Granite
Felsic intrusive igneous rock
igneous
Jasper (Zebra Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Pink Granite
Phaneritic intrusive igneous rock (Felsic)
igneous
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions
sedimentary
Orange Quartz with Hematite inclusions
Quartz (SiO2) with Hematite (Fe2O3) inclusions
Mineral
Satin Spar
Fibrous Gypsum (CaSO4·2H2O)
mineral
Fire Opal (Common/Precious in Matrix)
Hydrated Silica (SiO2·nH2O)
mineral
Jasper (Red Jasper)
Jasper (Silicon Dioxide, SiO2)
mineral
Ironstone Concretion (Moqui Marble)
Iron-oxide Concretion (Hydrated ferric oxide, Fe2O3·nH2O)
sedimentary
Carnelian (a variety of Chalcedony)
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Specular Hematite (Specularite)
Hematite (Iron(III) oxide) - Fe2O3
mineral
Granite (Pink/Potassium Feldspar Granite)
Felsic Plutonic Rock (Potassium Feldspar, Quartz, Mica, and Amphibole)
igneous
Botryoidal Hematite (Iron Stone Conglomerate)
Hematite (Fe2O3) in sedimentary matrix
sedimentary
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Amazonite
Amazonite (KAlSi3O8); a green variety of Microcline feldspar
mineral