Quartz
Quartz (SiO₂)
mineral
Category
Sedimentary (Silica Rich Mineral Variety)
Browse sedimentary (silica rich mineral variety) specimens identified by the Rock Identifier community.
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Moss Agate
Silicon Dioxide (SiO2) with mineral inclusions of hornblende or chlorite
Mineral (variety of Chalcedony)
Jasper
Jasper (Silicified microcrystalline quartz) - SiO2
sedimentary
Banded Rhyolite (likely Green Jasper/Agate variety)
Silicon Dioxide (SiO2) with mineral inclusions
igneous
Red Carnelian
Carnelian (Silicon Dioxide, SiO2)
mineral
Rough Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Druzy (on Calcedony/Quartz base)
Silicon Dioxide (SiO2)
mineral
Agate (specifically Chalcedony nodule)
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Aventurine (variety of Quartz - SiO2)
Mineral_Rock
Picture Jasper
Jasper (Silicon Dioxide, SiO2 with impurities)
sedimentary
Jasper and Ironstone (likely Jasperized Ironstone)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)
sedimentary
Quartz Vein in Host Rock (clastic sediment)
Silicon Dioxide (SiO2) in matrix
sedimentary
Chert (Flint/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Obsidian
Volcanic Glass (SiO2 + minor impurities)
igneous
Chert (specifically White Chert or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
mineral
Carnelian
Carnelian (Silicon Dioxide, SiO2)
mineral
Amethyst (Chevron or Dream Amethyst variety)
Tectosilicate Silicon Dioxide (SiO2) with iron impurities
mineral
Yellow Chalcedony (Carnelian/Yellow Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Mineral
Larimar
Pectolite (a blue variety of Pectolite)
Mineral
Petrified Dinosaur Bone (Gembone)
Agatized Dinosaur Bone
sedimentary
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in Geode form
sedimentary
Apatite
Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))
mineral
Black Opal
Hydrated Silica (SiO2·nH2O)
mineral
Chalcedony with Druzy Quartz Geode
Silicon Dioxide (SiO2)
mineral
Common Opal in Host Rock
Hydrated Silica (SiO2·nH2O)
mineraloid
Lazulite
Lazulite (MgAl2(PO4)2(OH)2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Milky Quartz Geode or Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Arenite (Fe2O3 rich)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Dendritic Agate
Silicon Dioxide (SiO2) with manganese/iron inclusions
mineral
Quartz Geode (Cracked Open)
Quartz (Silicon Dioxide - SiO2)
mineral
Chalcedony with Matrix
Silicon Dioxide (SiO2)
mineral
Carnelian
Carnelian (SiO2 - Silicon Dioxide with Hematite impurities)
mineral
Clear Quartz Cluster
Quartz (Silicon Dioxide - SiO2)
mineral