Green Calcite
Calcium Carbonate (CaCO3)
mineral
Category
Crystal
Browse crystal specimens identified by the Rock Identifier community.
Milky Quartz with Chlorite/Moss Infusions
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Carnelian pebbles)
Cryptocrystalline Quartz (SiO2)
mineral
Titanium Aura Quartz
Silicon Dioxide (SiO2) coated with Titanium and Niobium
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Clear or Cloudy Quartz)
Silicon Dioxide (SiO2)
mineral
Tiger's Eye (Inlaid in a band)
SiO2 (Silicon Dioxide with Crocidolite inclusions)
mineral
Smoky Quartz
Quartz (Silicon Dioxide), Formula: SiO2
mineral
Rose Quartz
Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese
mineral
Quartz (Common or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Druzy Quartz Geode
Silicon Dioxide (SiO2)
mineral
Ruby in Fuchsite
Cr-rich Muscovite (Fuchsite) with Corundum (Ruby)
metamorphic
Quartz Geode or Nodular Quartz
Silicon Dioxide (SiO2) in Host Matrix
mineral
Beryl (likely Pink/Morganite variety)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Diamond Druzy (Crystalline Diamond)
Carbon (C)
mineral
Snowflake Obsidian
Volcanic glass containing Cristobalite (SiO2)
igneous
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
mineral
Granite
Phaneritic intrusive igneous rock (Quartz, Feldspar, Mica)
igneous
Olivine Peridotite
Peridotite (comprising Olivine (Mg,Fe)2SiO4 and Pyroxene)
igneous
Snowflake Obsidian
Spherulitic Obsidian (contains Cristobalite inclusions)
igneous
Amber
Succinate (Succinite for Baltic varieties)
mineraloid
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Plutonic Igneous Rock
igneous
River Pebble (Quartz/Sandstone)
Silicon Dioxide (SiO2) Mix
sedimentary
Chrysocolla on Matrix
Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Basalt Porphyry
Porphyritic Basalt
igneous
Pink Granite
Phaneritic Plutonic Rock (Granite with K-Feldspar)
igneous
Porphyritic Basalt (Chinese Writing Stone or Flower Stone)
Porphyritic Basalt / Porphyry
igneous
Granite (Granitic Pegmatite/Porphyry)
Felsic intrusive igneous rock (Quartz, Feldspar, Mica composition)
igneous
Porphyritic Basalt
Basalt with Feldspar Phenocrysts
igneous
Porphyry (Flower Stone)
Porphyritic Basalt or Andesite
igneous
Dyed Pink Agate Slice
Cryptocrystalline variety of Quartz (SiO2)
mineral
Quartz (specifically a water-worn river pebble)
Silicon Dioxide (SiO2)
Mineral
Selenite (Satin Spar)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Green Fuchsite in Quartz (sometimes called Green Aventurine)
Fuchsite (Chrome-rich Muscovite) K(Al,Cr)2(AlSi3O10)(OH)2 in Quartz SiO2
metamorphic
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Schorl (Black Tourmaline) in Quartz Matrix
Schorl: NaFe3Al6(BO3)3Si6O18(OH)4 (Complex Borosilicate)
mineral
Granite
Intrusive Felsic Igneous Rock
igneous
Ruby in Quartz with Tourmaline
Corundum (Al2O3) in Silicon Dioxide (SiO2) with Schorl
metamorphic