Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Silica Rich Mineral Variety)
Browse sedimentary (silica rich mineral variety) specimens identified by the Rock Identifier community.
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Quartz Variety)
Microcrystalline Silica (SiO2)
sedimentary
Blue Chalcedony (likely dyed)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Chert / Flint
Cryptocrystalline quartz (SiO2)
sedimentary
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Red Jasper or Chert
Jasper (SiO2, a variety of chalcedony with iron oxide impurities), Chert (SiO2)
sedimentary
Black Jasper (Black Stone / River Pebble)
Silicon Dioxide (SiO₂), Opaque variety of Chalcedony
sedimentary
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Quartz Geode/Cluster
Quartz (SiO2)
mineral
Green Calcite (often commercially called Green Onyx)
Calcium Carbonate (CaCO3)
Mineral
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Carnelian
Carnelian (a variety of Chalcedony); SiO2 (Silicon Dioxide)
mineral
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
sedimentary
Tree Agate (or Moss Agate), faceted into a crystal tower
Dendritic Agate (Silicon Dioxide, SiO2)
Mineral
Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)
Chalcedony (SiO₂)
Mineral (or mineraloid if microcrystalline)
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite or Iron Oxide inclusions
sedimentary
Prase Quartz on Feldspar
Quartz (Silicon Dioxide, SiO2) with Hedenbergite inclusions on Potassium Feldspar (KAlSi3O8)
mineral
Fuchsite Schist
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Schist
metamorphic
Quartz (likely a clear or rock crystal variety)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Chert (Chert Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Satin Spar (Gypsum)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Iceland Spar (Optical Calcite)
Calcite (Calcium Carbonate, CaCO3)
mineral
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Silicon dioxide (SiO2)
mineral
Mixed Gemstone Bracelet
Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)
Mineral/Rock assemblage
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Crazy Lace Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Field Stone/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (Jasper/Chalcedony variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Chert / Flint Variety)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral