Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
Category
Browse mineral (specifically, a variety of the mineral species pyrope almandine garnet) specimens identified by the Rock Identifier community.
Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
Agate
Agate (a cryptocrystalline variety of Quartz, SiO₂)
Banded Agate (Lace Agate)
Agate (Variety of Cryptocrystalline Quartz), SiO2
Banded Agate
Silicon Dioxide (SiO2) - variety Chalcedony
Blue Lace Agate
Chalcedony (cryptocrystalline variety of Quartz), SiO2
Carnelian Agate
Silicon dioxide (SiO2) - variety of chalcedony
Ruby in Fuchsite
Corundum (Al2O3) in Fuchsite (K(Al,Cr)3Si3O10(OH)2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz (likely milky/rose quartz variety)
Quartz (SiO2 - Silicon Dioxide)
Beryl (var. Heliodor or Aquamarine)
Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)
Quartz (Rock Crystal) with minor impurities
Quartz (SiO2)
Malachite
Malachite (Cu2CO3(OH)2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
Quartz (White/Milky)
Silicon Dioxide (SiO2)
Flower Agate (Cherry Blossom Agate)
Chalcedony (Silicon Dioxide) with Opaque Inclusions - SiO2
Pyrite
Iron Sulfide (FeS2)
Citrine
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Yellow Quartz Pebble
Quartz (Silicon Dioxide - SiO2)
Quartz
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace impurities of titanium, iron, or manganese
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron
Jasper River Stone
Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
Jasper
Silicon dioxide (SiO2)
Jasper
Silicon dioxide / Chalcedony (SiO2)
Chert (specifically Jasper/Flint pebble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Satin Spar (often marketed as Selenite)
Fibrous Gypsum (CaSO4·2H2O)
Sandstone (Greywacke)
Arenite / Clastic Sedimentary Rock
Bronzite
MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
Hematite
Iron(III) oxide (Fe2O3)
Potassium Feldspar (Orthoclase)
KAlSi3O8
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)
Quartz (likely Jasper or Chert variety)
Quartz (SiO₂)
Rose Quartz
Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese
Opalite
Synthetically produced glass (Silicon Dioxide with metallic inclusions)
Smoky Quartz
Smoky Quartz (SiO2: Silicon Dioxide)
Quartz (likely)
Quartz (SiO2 - Silicon Dioxide)
Quartz
Silicon Dioxide (SiO2)