Yellow Chalcedony (Agate)
Silicon Dioxide (SiO2)
Category
Browse mineral, specifically a variety of quartz specimens identified by the Rock Identifier community.
Yellow Chalcedony (Agate)
Silicon Dioxide (SiO2)
Chert (Flint Nodules)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Granite Pebble
Phaneritic Felsic Igneous Rock (Granite)
Flint / Chert Nodules in Limestone
Cryptocrystalline Quartz (SiO2) within Carbonate Rock
Blue Lace Agate
Chalcedony (SiO2) with trace minerals
Tiger's Eye (Multicolor/Variegated)
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxides)
Chert (Flint) with Limestone Matrix
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
Citrine Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions
Blue Chalcedony
Silicon Dioxide (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Chert (or possibly Flint)
SiO2 (Silicon Dioxide)
Yellow Calcite
Calcium Carbonate (CaCO3)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Chalcedony (Agate and Carnelian varieties)
Silicon Dioxide (SiO2)
Carnelian Agate
Silicon Dioxide (SiO2) with Iron Impurities
Chert (Flint)
Microcrystalline Quartz (SiO2)
Pink Granite
Phaneritic intrusive igneous rock (rich in Potassium Feldspar)
Granite / Gneiss Ballast Rock
Granite (Quartzo-feldspathic rock)
Red Jasper Concretion
Cryptocrystalline Quartz (SiO2)
Quartz Geode
Crystalline Silicon Dioxide (SiO2)
Lemon Quartz (Orizaba/Citrinated Quartz)
Silicon Dioxide (SiO2) with iron impurities/treatment
Red Jasper
Silicon Dioxide with iron impurities (Quartz variety, SiO2)
Sandstone (Greywacke)
Arenite / Greywacke Sandstone
Jasper (specifically Bloodstone or Heliotrope variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Ocean Jasper
Silicon Dioxide (SiO2) with iron and other mineral inclusions
Banded Agate
Cryptocrystalline Quartz (SiO2)
Yellow Aventurine
Quartz variety (SiO2) with inclusions
Smoky Quartz
Silicon Dioxide (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Sandstone (with Possible Iron Staining/Crust)
Arenite (SiO2 based)
Citrine Quartz
Silicon Dioxide (SiO₂) with iron impurities
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Banded Agate (Tumbled)
Silicon Dioxide (SiO2)
Agate (specifically Waterline or Onyx-type Agate)
Silicon Dioxide (SiO2) - variety Chalcedony
Quartz (specifically Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)