Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Category
Sedimentary Or Metamorphic
Browse sedimentary or metamorphic specimens identified by the Rock Identifier community.
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Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite (Iron Pyrite)
Iron Sulfide (FeS2)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Dragon Blood Jasper
Epidote with Red Jasper inclusions (SiO2 and Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Biotite Schist
Biotite Schist
Metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Greenstone
Metamorphosed Mafic Igneous Rock
metamorphic
Banded Onyx (Green Onyx)
Banded Calcite or Travertine (CaCO3)
Sedimentary
Gneiss
Gneiss (High-grade metamorphic rock composed primarily of Quartz, Feldspar, and various Micas)
metamorphic
Ruby
Corundum (Al2O3 with chromium impurities)
mineral
Banded Gneiss (River Cobble)
Gneiss (a high-grade metamorphic rock)
metamorphic
Greenschist
Greenschist facies rock
Metamorphic
Mixed Gemstone Bracelet
Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)
Mineral/Rock assemblage
Apatite
Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))
mineral
Quartz River Pebbles
Silicon Dioxide (SiO2)
sedimentary
Staurolite
Staurolite (Fe2+2Al9Si4O23(OH))
metamorphic
Gneiss
Gneiss (a type of metamorphic rock)
Metamorphic Rock
Epidote
{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
mineral
Garnet Schist
Almandine-Muscovite Schist
metamorphic
Marble
Marbles are primarily composed of calcite (calcium carbonate, CaCO3) or dolomite (calcium magnesium carbonate, CaMg(CO3)2).
Metamorphic Rock
Garnet (Almandine/Pyrope series)
Garnet Group - X3Y2(SiO4)3
mineral
Graphite-veined Quartzite
Meta-sedimentary Quartzite with Carbonaceous/Graphitic Inclusions (SiO2 + C)
metamorphic
Gneiss
Gneiss (Metamorphic rock of variable composition, typically SiO2 rich)
metamorphic
Rough Garnet (Almandine)
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Pyrite
Pyrite (FeS₂)
Mineral
Quartz
Silicon Dioxide (SiO2)
Mineral
Jasper (Iron-stained Chert)
Silicon Dioxide (SiO2)
sedimentary
Black Tourmaline (Schorl)
Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3(OH)4)
Mineral
Milky Quartz
Quartz (Silica / Silicon Dioxide), SiO2
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Milky Quartz
Quartz (Silica / Silicon Dioxide, SiO2)
mineral
Agate
Banded Chalcedony (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral