Polished brecciated jasper bracelet
Jasper, microcrystalline quartz (SiO₂), commonly with hematite and iron-oxide inclusions
gemstone
Category
Sedimentary Rock (Technically A Variety Of Chalcedony)
Browse sedimentary rock (technically a variety of chalcedony) specimens identified by the Rock Identifier community.
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Jasper
Silicon dioxide (SiO2)
sedimentary
Chert (Common Opal/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Tumbled jasper, likely brecciated or orbicular jasper
Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide impurities
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
River Jasper (Chert/Chalcedony mix)
Silicon Dioxide (SiO2) with iron oxide and chlorite inclusions
sedimentary
Fossil Coral
Hexagonaria (Rugose coral) / Rugosa
fossil
Jasper with Quartz Veining
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Red and Yellow Jasper
Silicon Dioxide (SiO2)
sedimentary
Tumbled orange-red quartz or carnelian
Microcrystalline quartz, SiO₂; likely carnelian (orange chalcedony), possibly iron-stained quartz
gemstone
Jasper
Silicon dioxide (SiO2)
sedimentary
Polished black obsidian
Volcanic glass; primarily silica-rich rhyolitic composition (SiO₂)
igneous
Ocean Jasper
Silicon Dioxide (SiO2) with various inclusions
Mineral (Variety of Quartz)
Jasper with Quartz Druzy
Silicon Dioxide (SiO2)
sedimentary
Polished banded obsidian
Volcanic glass, predominantly SiO₂; likely banded or mahogany obsidian
igneous
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) - Opaque Chalcedony
sedimentary
Flower Agate
Silicon Dioxide (SiO2) with Chalcedony inclusions
mineral
Chalcedony (Blue Agate Nodules)
Silicon Dioxide (SiO2)
mineral
Chalcedony
Silicon Dioxide (SiO2)
mineral
Fancy Jasper
Chalcedony (cryptocrystalline quartz) with inclusions
Mineral
Tumbled amber-colored chalcedony or jasper
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper
mineral
Chalcedony (Botryoidal)
Silicon Dioxide (SiO2)
mineral
Brown chert or jasper fragment
Microcrystalline quartz (SiO₂), likely iron-stained chert/jasper
sedimentary
Likely polished jasper or brecciated chert
Microcrystalline quartz (SiO₂), possibly with iron-oxide and carbonate inclusions
sedimentary
Jasper (Red Jasper with Quartz veins)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Carnelian
SiO2 (Variety of Chalcedony)
gemstone
Tumbled jasper
Microcrystalline quartz (chalcedony), chiefly SiO₂, colored by iron oxides and other impurities
mineral
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Orange chalcedony / agate fragment
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony
mineral
Botryoidal Agate
Silicon Dioxide (SiO2)
mineral
Beach Pebbles and Jasper
Quartz / Microcrystalline Silicon Dioxide (SiO2)
sedimentary
Tumbled brown agate (probable)
Microcrystalline quartz, SiO₂ (chalcedony/agate)
mineral
Zebra Jasper
Silicon Dioxide (SiO2)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Zebra Jasper
Tainted Silicate (mainly Quartz/Chalcedony/Calcite)
sedimentary
Polished banded agate
Banded chalcedony, microcrystalline quartz (SiO₂)
mineral
Dark Agate / Chalcedony
Microcrystalline Quartz (SiO2)
sedimentary
Banded Calcite (often sold as 'Mexican Onyx')
Calcite (Calcium Carbonate, CaCO3)
Mineral / Sedimentary Rock
Jasper
Silicon dioxide (SiO2)
sedimentary