Calcite (Yellow/Orange variety - sometimes called Honey Calcite)
Calcite
Category
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
Calcite (Yellow/Orange variety - sometimes called Honey Calcite)
Calcite
Red Jasper
Jasper (a variety of Chalcedony, SiO₂)
Galena
Lead(II) sulfide (PbS)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Basalt
Basalt (extrusive igneous rock)
Quartz on Feldspar
Silicon Dioxide (SiO2) with Potassium Feldspar (KAlSi3O8)
Slate
Slate
Granite
Granite (Mainly Quartz, Feldspar, and Mica)
Olivine (Peridotite)
Magnesium Iron Silicate - (Mg, Fe)2SiO4
Olivine (in Peridotite/Dunite form)
Magnesium Iron Silicate (Mg,Fe)2SiO4
Basalt
Extrusive mafic igneous rock
Olivine (Peridotite)
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
Gold-bearing Quartz with Iron Oxides
Quartz (SiO2) with Limonite/Goethite (FeO(OH)) and Pyrite (FeS2)
Citrine
Silicon Dioxide (SiO2)
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
Quartz (specifically Milky Quartz/Quartzite)
Silicon Dioxide (SiO2)
Diamond (likely facet or crystal shard)
Diamond (C)
Lapis Lazuli (Fragment)
Lazurite-rich metamorphic rock
Limonite (Ironstone)
Hydrous ferric oxides (FeO(OH)·nH2O)
Sulfur
Native Sulfur (S8)
Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment)
Quartz (SiO₂)
Chert
Chert (microcrystalline quartz, SiO2)
Rock Salt / Halite Crust
Halite (Sodium Chloride, NaCl)
Coquina
Biogenic Limestone (Coquina)
Laterite (iron-rich nodule, possibly Bauxite as a subtype)
Laterite (composed of various minerals including goethite, hematite, gibbsite, etc.)
Basalt
Basalt
Olivine (Peridot)
Olivine (Mg, Fe)2SiO4
Granite
Phaneritic Felsic Igneous Rock
Chert (Flint)
Chert (microcrystalline quartz)
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
Lapis Lazuli (polished cabochon)
Lazurite-rich rock (Na8[Al6Si6O24]n(S,Cl,SO4,OH)2)
Arfvedsonite (often mistakenly sold as Astrophyllite)
Arfvedsonite [Na3(Fe2+)4Fe3+Si8O22(OH)2]
Granite
Felsic Plutonic Rock (Granite)
Gold
Native Gold (Au)
Peridot
Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4
Goethite
Goethite (FeO(OH))
Granite Pebble
Granite (phaneritic igneous rock)
Porphyritic Andesite
Intermediate Volcanic Rock - Andesite
Olivine in Basalt (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) / Scoriaceous Basalt (Host Rock)
Granite
Intrusive igneous rock (high SiO2)
Olivine in Basalt
Peridotite / Forsterite ((Mg,Fe)2SiO4)