Jasper and Agate (Polished Pebble)
Chalcedony (SiO2 with impurities)
Sedimentary
Category
Mineral, Specifically A Cryptocrystalline Quartz Variety
Browse mineral, specifically a cryptocrystalline quartz variety specimens identified by the Rock Identifier community.
Banded Agate (Gray/White)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Amethyst
SiO2 (Silicon Dioxide)
Mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Unakite
Epidotized Granite
Igneous rock
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Chert (White Chert / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint)
Microcrystalline to cryptocrystalline quartz (SiO2)
sedimentary
Chert (specifically Yellow/Tan Chert)
Silicon Dioxide (SiO2)
sedimentary
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Dendritic Agate (specifically Orange/Tumbled)
Silicon Dioxide (SiO2) with Oxide Inclusions
mineral
Banded Calcite (often sold as 'Green Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Amethyst
SiO2 (Silicon Dioxide)
Mineral
Quartz (likely Rose Quartz or Milky Quartz based on color)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Quartz Vein in Host Rock (Gossanous Matrtix)
Silicon Dioxide (SiO2) with iron oxides (Limonite/Hematite)
mineral
Quartz (Milky or Cloudy variety)
Silicon Dioxide (SiO2)
mineral
Aragonite (specifically Mexican Marbled Onyx)
Aragonite (Calcium Carbonate, CaCO3)
mineral
Amazonite
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Blue Quartzite (Aventurine variety)
Silicon Dioxide (SiO2) with inclusions of Dumortierite or Magnesio-riebeckite
metamorphic
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Yellow Quartz (Citrine Quartz variety / Ferruginous Quartz)
Silicon Dioxide (SiO2) with iron inclusions
mineral
Quartz / Rock Crystal
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Rose Quartz (SiO2 with traces of Ti, Fe, or Mn)
mineral
Sandstone or Mudstone with Iron Staining
Ferruginous Sandstone/Mudstone
Sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Jade (likely Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)
Mineral
Chert (often found as Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron inclusions
mineral
Pink Granite
Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)
igneous
Carnelian Agate
Silicon dioxide (SiO2) - variety of Chalcedony
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Chert (specifically Jasper/Carnelian Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz (River-worn Pebble)
Quartz (SiO2)
Mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
mineral
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Rose Quartz
Quartz (SiO2) with trace amounts of Titanium, Iron, or Manganese
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Pink Granite
Phaneritic Felsic Igneous Rock
igneous
Chert (Common Opal/Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Rose Quartz
SiO2 (Silicon Dioxide with trace inclusions)
mineral