Calcite
Calcite (Mineral, Calcium Carbonate - CaCO3)
Mineral
Category
Igneous And Sedimentary
Browse igneous and sedimentary specimens identified by the Rock Identifier community.
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Granite Gneiss
Gneiss (derived from granitic protolith)
metamorphic
Orange Calcite
Calcite (CaCO3)
Mineral
Amazonite
Amazonite (KAlSi3O8) - a variety of Microcline Feldspar
Mineral
Granite
Granite (a common rock type, not a single mineral; composed primarily of Quartz, Feldspar (Orthoclase and Plagioclase), and Mica (Biotite and/or Muscovite) and/or Amphibole)
Igneous
Granite
Granite
igneous
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Celestine (Celestite)
Strontium sulfate (SrSO4)
mineral
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Granite
Granite (a plutonic igneous rock)
Igneous
Dalmatian Stone
Dalmatian Jasper (Aplitic Perthite)
igneous
Granite
Phaneritic plutonic rock (composed mainly of SiO2, Al2O3, K2O, and Na2O)
igneous
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Olivine in Basalt matrix
Peridotite (Mg, Fe)2SiO4
igneous
Dalmatian Stone
Dalmatian Jasper / Feldspathic Igneous Rock
igneous
Gold and Silver (in jewelry form)
Gold (Au) and Silver (Ag)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Milky Quartz (Common Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Astrophyllite
Astrophyllite (K2NaFe7Ti2Si8O26(OH)4F)
mineral
Schorl (Black Tourmaline)
Sodium Iron Aluminum Borosilicate Hydroxide; NaFe2+3Al6Si6O18(BO3)3(OH)3OH
mineral
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Quartz with Mica inclusions (Gold-colored Mica)
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (Phlogopite/Muscovite) inclusions
Mineral
Knightia Fossil in Limestone
Knightia eocaena in micritic limestone
sedimentary
Puddingstone (Gowganda)
Gowganda Formation Conglomerate
sedimentary
Sandstone (with ripple marks)
Arenite / Quartz Sandstone
sedimentary
Moqui Marble (Concretion)
Iron Oxide Concretion (Hematite-cemented Sandstone)
sedimentary
Chert (Jasper/Opaline variety)
Silicon Dioxide (SiO2)
sedimentary
Labradorite (likely Black Labradorite or Larvikite)
Labradorite (Na,Ca)(Al,Si)4O8. If a rock, it is typically anorthosite, gabbro, or norite, or a variety of syenite called Larvikite if it is specifically from Larvik, Norway.
Mineral/Igneous Rock
Fossiliferous Limestone with Brachiopod
Phylum Brachiopoda in calcitic matrix
sedimentary
Lepidodendron Fossil in Sandstone
Lepidodendron (Lycophytina, Lepidodendrales)
sedimentary
Diopside (likely Chromian Diopside)
Diopside, part of Clinopyroxene family of inosilicates. Chemical formula: CaMgSi2O6. The green variety is often Chromian Diopside due to chromium impurities.
mineral
Granite
Granite (a plutonic igneous rock)
Igneous
Raw Citrine
Citrine (Silicon Dioxide - SiO2)
mineral
Cloud Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Cloudy Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Vein (Iron-stained)
Silicon Dioxide (SiO2) with limonite/hematite staining
mineral
Citrine Quartz Geode
Silicon Dioxide (SiO2) with iron impurities
mineral
Pegmatite (Granite Pegmatite)
Intrusive Igneous Rock (Granite Pegmatite)
igneous
Sodalite
Sodalite (Na4Al3Si3O12Cl)
Mineral