Bloodstone (also known as Heliotrope)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Category
Sedimentary (Silica Rich Mineral Variety)
Browse sedimentary (silica rich mineral variety) specimens identified by the Rock Identifier community.
Dyed Agate
Silicon Dioxide (SiO2) - variety Chalcedony
mineral
Carnelian (Orange Chalcedony)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Orange Satin Spar (Satin Spar Selenite)
Satin Spar - Hydrous Calcium Sulfate (CaSO4·2H2O)
mineral
Bauxite
Bauxite (Mixture including Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))
sedimentary
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Desert Rose
Gypsum (CaSO4·2H2O) or Baryte (BaSO4) with trapped sand grains
mineral
Jasper (Zebra Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Agate (Crazy Lace or Eye Agate)
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
mineral
Druzzy Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Tiger's Eye (Multicolor/Variegated)
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxides)
mineral
Blue Lace Agate (often dyed)
Silicon dioxide (SiO2) - variety of chalcedony
mineral
Opal
Hydrated Silica (SiO2·nH2O)
mineral
Banded Agate (specifically Moss Agate or Plume Agate variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (often called Flint)
Chert (Microcrystalline or cryptocrystalline Silica, SiO2)
sedimentary
Agate
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Chalcedony (Agate/Jasper mix in host rock)
Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)
mineral
Corundum
Corundum (Aluminium oxide, Al2O3)
mineral
Chert (Yellow Jasper variant)
Silicon Dioxide (SiO2)
sedimentary
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Quartz (Silicon Dioxide, SiO2) with trace inclusions of dumortierite
mineral
Chert (often called Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Pyrite
Iron Pyrite (FeS2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone concretion (Ironstone-stained)
Arenite with Limonite/Hematite staining (Silica-based with Iron Oxides)
sedimentary
Red Mudstone (Siltstone)
Lutite (primarily Quartz and Clay minerals with Hematite)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Chalcedony (Botryoidal or Tumbled)
Chalcedony (SiO₂)
mineral
Dalmatian Stone
Peralkaline Feldsphathic Igneous Rock
igneous
Chert (Jasper)
Microcrystalline Silica (SiO2)
sedimentary
Quartz (Citrine or Iron-Stained variety)
Silicon Dioxide (SiO2)
mineral
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)
mineral
Milky Quartz
Silicon Dioxide (SiO₂)
Mineral
Druzy Quartz
Silicon Dioxide (SiO2)
mineral