Fluorite
Calcium Fluoride (CaF2)
mineral
Category
This Image Does Not Display A Rock, Mineral, Or Geological Specimen. It Shows A Human Hand Wearing A Ring.
Browse this image does not display a rock, mineral, or geological specimen. it shows a human hand wearing a ring. specimens identified by the Rock Identifier community.
Pumice
Pumice (Highly vesicular volcanic glass)
igneous
Green Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Sandstone
Arenite (a specific type of sandstone with less than 15% matrix)
Sedimentary rock
Amber
Succinite (Formula: C10H16O)
Mineraloid
Aluminum Slag
Anthropogenic Aluminum (Al)
mineral
Mystic Topaz
Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)
mineral
Gneiss (specifically a weathered Amphibolite or Garnet Gneiss)
Gneiss (complex silicate composition)
metamorphic
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt (Vesicular/Amygdaloidal or Water-Worn)
Basalt
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Red Jasper (Heliotrope family variant)
Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)
sedimentary
Granite
Phaneritic Plutonic Felsic Rock (KAlSi3O8 - SiO2 - NaAlSi3O8)
igneous
Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
sedimentary
Turquenite (Dyed Howlite)
Dyed Ca2B5SiO9(OH)5 (Calcium Borosilicate Hydroxide)
mineral
Zirconia (Ceramic) & Ion-X Glass
Zirconium Dioxide (ZrO2) and Ion-strengthened Aluminosilicate Glass
Synthetic Mineral / Glass
Porphyry (likely Porphyritic Andesite or Basalt)
Porphyritic Igneous Rock
igneous
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (and Limestone)
Silicon Dioxide (SiO2)
sedimentary
Pink Quartzite
Quartzite (primarily SiO2)
metamorphic
Smoky Quartz
Smoky Quartz (SiO2 - Silicon Dioxide with trace impurities of aluminum)
mineral
Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (SiO2)
sedimentary
Limonite (Iron Ore)
Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Sandstone (River Pebble)
Arenite (primarily SiO2)
sedimentary
River Jasper (Chert/Chalcedony mix)
Silicon Dioxide (SiO2) with iron oxide and chlorite inclusions
sedimentary
Yellow Jasper
Chalcedony (Silicon Dioxide with iron inclusions), SiO2
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Shale
Fissile Mudstone (Shale)
sedimentary
Aquamarine
Beryl (Be3Al2Si6O18 with Fe2+ impurities)
mineral
Kyanite in Quartz
Al2SiO5 in SiO2
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Quartz)
metamorphic
Chert (Flint variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
K2 Jasper (K2 Granite)
Azurite in Granite (Al2Cu3(CO3)2(OH)2 in NaAlSi3O8)
igneous
Sparkling Druzy Quartz on Matrix
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Druzy Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide with iron inclusions (SiO2)
sedimentary
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral