Diamond
Carbon (C), specifically a solid form of the element carbon with atoms arranged in a crystal structure called diamond cubic.
Category
Browse mineral (man made glass, not natural) specimens identified by the Rock Identifier community.
Diamond
Carbon (C), specifically a solid form of the element carbon with atoms arranged in a crystal structure called diamond cubic.
Hematite
Hematite (Fe2O3)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Demantoid Garnet on Matrix
Demantoid (variety of Andradite Garnet) - Ca3(Fe3+)2(SiO4)3
Turquoise in Matrix
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
Peacock Ore (Bornite or Iridescent Chalcopyrite)
Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with oxidation
Turquoise (Green variety)
Hydrous phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
White Agate (Tumbled)
Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony
Ruby
Corundum (Al2O3 with Chromium impurities)
Rose Quartz
Silicon Dioxide (SiO2) with trace impurities of Titanium, Manganese, or Iron
Sandstone (Cross-bedded Drill Core)
Clastic Sedimentary Rock (primarily SiO2)
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
Sandstone (likely a river or beach pebble)
Sandstone (a clastic sedimentary rock)
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
Amber
Succinite (specifically for Baltic amber); approximate formula C10H16O
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (SiO2 primary composition)
Shale
Fissile Clay-dominant Mudrock (SiO2, Al2O3, K2O, Na2O, CaO, MgO)
Quartz (White/Milky Pebble)
Silicon Dioxide (SiO2)
Black Tourmaline (Schorl)
Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3(OH)4)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Diamond
Native Carbon (C)
Diamond (in jewelry setting)
Diamond (Native Carbon, C)
Turquoise (likely Sleeping Beauty variety or treated Howlite imitation)
Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Conglomerate
Conglomerate (clastic sedimentary rock)
Red Jasper
Jasper (Silicate Mineral), SiO2 with Fe2O3 inclusions
Granite (Weathered)
Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica)
Obsidian
Obsidian (Volcanic Glass)
Quartz (Variety of Rough Mineral Specimens)
Silicon Dioxide (SiO2)
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Granite
Granite (a broadly defined plutonic igneous rock, often more specifically classified as quartz monzonite or granodiorite based on precise mineral percentages)
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
Amethyst (in jewelry)
Silicon Dioxide (SiO2) with iron impurities
Pearl
Calcium Carbonate (primarily Aragonite and Calcite), CaCO3
Turquoise and Red Coral
CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Corallium rubrum (Red Coral)
Gold
Native Gold (Au)
Turquoise
Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
Snowflake Obsidian
Spherulitic Volcanic Glass (primarily SiO2 with Cristobalite inclusions)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]