Amethyst
SiO2 (Amethyst is a variety of Quartz)
Category
Browse synthetic glass (often categorized as a simulated mineral) specimens identified by the Rock Identifier community.
Amethyst
SiO2 (Amethyst is a variety of Quartz)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Pumice
Pumice (Vesicular volcanic glass)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz (Milky or Citrine-leaning)
Silicon Dioxide (SiO2)
Chert (Cherty Limestone / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Chert Nodule (Fossiliferous Chert)
Microcrystalline Quartz (SiO2)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Yellow Quartz
Silicon Dioxide (SiO2)
Fuchsite Quartzite (Green Quartzite)
Fuchsite-bearing Quartzite (K(Al,Cr)2(AlSi3O10)(OH)2 + SiO2)
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Jasper (Banded Jasper)
Silicon Dioxide (SiO2) with impurities
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock - Arenite
Citrine
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Sandstone (with minor quartz and possible clay components)
Clastic Sedimentary Rock (SiO2 dominated)
Chert (Jasper)
Silicon Dioxide (SiO2)
Muscovite Schist
Muscovite Mica Schist (KAl2(AlSi3O10)(OH)2)
Pink Quartzite
Quartzite (SiO2)
Slag (Industrial By-product)
Anthropogenic Vitreous Silica/Iron Silicate
Blue Quartz (specifically Dumortierite Quartz)
Silicon Dioxide (SiO2) with inclusions of Dumortierite (Al7BO3(SiO4)3O3)
Jasper
Silicon dioxide (SiO2)
Feldspar-rich Pegmatite
Granitic Pegmatite (principally KAlSi3O8)
Quartz Pebble
Silicon Dioxide (SiO2)
Massive Quartz (Yellow/Citrine variety)
Silicon Dioxide (SiO2)
Vuggy Quartz on Matrix
Silicon Dioxide (SiO2)
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Sandstone
Arenite (SiO2 primarily)
Sandstone
Arenite (composed primarily of SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Chert (variations include Chalcedony and Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions