Quartzite
Quartzite (primarily SiO2)
Category
Browse not a rock (animated character) specimens identified by the Rock Identifier community.
Quartzite
Quartzite (primarily SiO2)
Granite (Pink/Potassium-rich)
Phaneritic Plutonic Felsic Igneous Rock (primarily SiO2 with KAlSi3O8)
Quartzite with Hematite
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 inclusions)
Amethyst
Amethyst (Silicon Dioxide, SiO2)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Amethyst
Amethyst (Silicon Dioxide - SiO2 with impurities of iron)
Quartzite
Quartzite (SiO2)
Amethyst
Quartz (Silicon Dioxide) with Iron impurities, SiO2
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
Orange Quartzite (Tumbled Beach Pebble)
Quartzite (primarily SiO2)
Amazonite
Amazonite (KAlSi3O8)
Carnelian
Carnelian (subset of Chalcedony); SiO2 with Iron Oxide impurities
Sandstone
Sandstone (clastic sedimentary rock)
Hematite
Hematite (Iron(III) oxide, Fe2O3)
Arfvedsonite with Garnet
Na3(Fe2+,Mg)4Fe3+Si8O22(OH)2
Kyanite (in Schist Matrix)
Kyanite (Al2SiO5)
Dendritic Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Serpentinite
Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Lapis Lazuli
Lapis lazuli (Mainly Lazurite: Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
Banded Agate (Tumbled)
Cryptocrystalline Quartz (SiO2)
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
Chert Nodule
Microcrystalline Silica (SiO2)
Red Chert (Jasper)
Chert / Microcrystalline Quartz (SiO2)
Jasper
Jasper (Silicon Dioxide, SiO2)
Smoky Quartz
Smoky Quartz (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Chert (often called Jasper in this color)
Microcrystalline quartz (SiO2)
Quartz / Chert
Silicon Dioxide (SiO2)
Chert (specifically Tan Chert)
Chert (SiO2)
Corundum
Corundum (Aluminium oxide, Al2O3)
Bloodstone (Heliotrope)
Silicon Dioxide (SiO2) with inclusions of Iron Oxide or Chlorite
Chevron Amethyst
Silicon Dioxide (SiO2) with iron impurities
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Blue Agate (Dyed)
Silicon Dioxide (SiO2) with artificial pigment
Carnelian (a variety of Chalcedony)
SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz
Black Obsidian
Obsidian (Volcanic Glass)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Carnelian (Red Chalcedony)
Silicon Dioxide (SiO2) with iron oxide impurities
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)