Petrified Wood
Silicified wood (primarily SiO2)
metamorphic
Category
Mineral (Specifically A Variety Of Chalcedony, Which Is A Microcrystalline Quartz)
Browse mineral (specifically a variety of chalcedony, which is a microcrystalline quartz) specimens identified by the Rock Identifier community.
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions
sedimentary
Septarian Nodule (Yellow Jasper variety)
Septarian Nodule (comprising Calcite, Aragonite, and Limestone/Bentonite)
sedimentary
Chevron Amethyst
Quartz (SiO2) with patterned Amethyst and White Quartz/Milky Quartz
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Blue Chalcedony (Tumbled)
Silicon Dioxide (SiO2)
mineral
Dyed Agate Geode (Pink/Magenta)
Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Yellow Jasper
Chalcedony (SiO2)
sedimentary
Carnelian
Carnelian (variety of Chalcedony, SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Chert (specifically a variety like Flint or River Jasper with Iron Oxidation)
Microcrystalline Quartz (SiO2)
sedimentary
Banded Onyx (Mexican Onyx / Travertine)
Calcite (CaCO3) - Banded Travertine
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Iron Oxide impurities
sedimentary
African Turquoise (Jasper)
Polychrome African Jasper (often marketed as 'African Turquoise' due to its color, but it is not true turquoise)
Rock
Chert (Chalky variety)
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)
sedimentary
Quartz (specifically Milky or Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Rough Corundum (Sapphire/Ruby mixture)
Corundum (Aluminum Oxide, Al2O3)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Red Jasper
Silicon dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Chert (Red Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Chalcedony Geode Fragment
Microcrystalline Quartz (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Agate (specifically Botswana or Lake Superior style Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Sandstone (Graywacke)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
mineral
Pink Dyed Agate
Silicon Dioxide (SiO2) - Variety Agate
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Quartz (Milky/Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2)
sedimentary
Tumbled Carnelian and Quartz Mix
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Rough Green Adventurine
Aventurine (Variety of Quartz, SiO2)
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Green Aventurine
Silicon dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic