Satin Spar (often sold as Selenite)
Gypsum (CaSO4·2H2O)
mineral
Category
Mineral (Synthetic)
Browse mineral (synthetic) specimens identified by the Rock Identifier community.
Sandstone
Arenite (SiO2 primarily)
sedimentary
Granite
Granite (Felsic intrusive igneous rock)
igneous
Charoite
Charoite (Hydrated potassium, sodium, calcium, barium, strontium silicate hydroxide fluoride)
metamorphic
River Stone (Granitic Gneiss)
Foliated Granitic Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Copper-bearing Quartz (likely Malachite on Quartz matrix)
Cu2CO3(OH)2 (Malachite) on SiO2 (Quartz)
mineral
Greenstone
Metabasalt / Greenschist facies rock
metamorphic
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Granite (Pink/Red)
Phaneritic Plutonic Felsic Rock (major minerals: Quartz, Orthoclase Feldspar, Plagioclase Feldspar)
igneous
Gneiss (Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Granite
Plutonic felsic rock (Quartz, Feldspar, Mica)
igneous
Quartz Pebble (with probable inclusions or staining)
Quartz (Silicon Dioxide - SiO2)
mineral
Granite (with Orthoclase and Quartz)
Phaneritic Felsic Igneous Rock (KAlSi3O8 + SiO2)
igneous
Diorite (River Rock)
Intermediate plutonic igneous rock
igneous
Sandstone (Greywacke)
Arenite / Clastic Sedimentary Rock
sedimentary
Granite featuring Quartz Vein
Granite with hydrothermal silica (SiO2) intrusion
igneous
Diamond (Macled/Crystal fragment)
Carbon (C), isometric crystal system
mineral
Granite
Granite (Phaneritic igneous rock)
igneous
Granite
Phaneritic Igneous Rock (Granite)
igneous
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Botryoidal Chalcedony (Agate/Desert Rose Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Amethyst (Polished/Carved Crystal)
Silicon Dioxide (SiO2) with trace Iron (Fe)
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with ferric iron impurities)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Druzy Quartz on Limestone
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Quartz (specifically Clear Quartz with iron/hematite staining)
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified wood (primarily SiO2 - Silicon Dioxide/Quartz)
metamorphic
Amethyst (Quartz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Biotite / Black Mica
K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Amethyst (Tumbled)
Silicon Dioxide (SiO2) with iron impurities
mineral
Smoky Quartz
Smoky Quartz (SiO2)
mineral
Ocean Jasper
Orbicular Jasper (Silicon Dioxide with impurities), SiO2
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Amethyst
Silicon Dioxide (SiO2) with Iron impurities
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Siltstone
SiO2 (Quartz) on clastic sedimentary matrix
sedimentary
Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Mineral
Dragon Blood Jasper (Epidote with Piedmontite or Quartz)
Epidote-rich Quartzite / SiO2 with (Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH))
metamorphic