Chert (or Flint)
Chert (cryptocrystalline quartz), SiO2
Category
Browse mineral (specifically a variety of quartz) specimens identified by the Rock Identifier community.
Chert (or Flint)
Chert (cryptocrystalline quartz), SiO2
Pearl
Calcium carbonate (CaCO3) + organic conchiolin (Biogenic Mineral)
Carnelian (Orange Agate)
Silicon Dioxide (SiO2)
Quartz (likely milky quartz or a stained variety)
Silicon Dioxide (SiO₂)
Amethyst
Amethyst (Silicon Dioxide - SiO2 with impurities of iron)
Quartz Pebble (Chert/Chalcedony)
Silicon Dioxide (SiO2)
Blue Lace Agate
Silicon Dioxide (SiO₂)
Jasper
Silicon dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Red Jasper
Jasper (Silicon Dioxide, SiO2)
Quartz Geode
Silicon Dioxide (SiO2) within a secondary sedimentary structure
Milky Quartz (Tumbled)
Quartz (Silicon Dioxide, SiO2)
Quartz Geode
Silicon Dioxide (SiO₂)
Basalt
Basalt (Mafic volcanic rock)
Quartz
Silicon Dioxide (SiO2)
Pink Dyed Agate
Silicon Dioxide (SiO2) - Variety Agate
Granite
Granite (a broadly defined plutonic igneous rock, often more specifically classified as quartz monzonite or granodiorite based on precise mineral percentages)
Puddingstone (Jasper-Conglomerate)
Conglomerate (Silicon Dioxide, SiO2 with impurities)
Polychrome Jasper
Silicon Dioxide (SiO2) with impurities
Quartz
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2)
Amazonite
Potassium Feldspar (KAlSi3O8)
Amazonite
Potassium Feldspar (KAlSi3O8) with lead impurities
Zebra Jasper
Jasper (variety of Quartz/Chalcedony), SiO2
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Rose Quartz
Silicon Dioxide (SiO2) with trace impurities of titanium, iron, or manganese
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
Quartz Pebble (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
Quartz
SiO₂ (Silicon Dioxide)
Yellow Jasper
Silicon Dioxide (SiO2) - Impure Cryptocrystalline Quartz
Ruby (Raw/Rough)
Corundum (Al2O3 with Chromium trace)
Quartz (chalcedony variety) or Limestone with Quartz Veins
SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Jasper
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Rough Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Rose Quartz
Silicon Dioxide (SiO2)