Tumbled chalcedony (likely carnelian or common agate)
Microcrystalline quartz, SiO₂; chalcedony variety
mineral
Category
Mineral (Specifically A Variety Of Chalcedony, Which Is Microcrystalline Quartz)
Browse mineral (specifically a variety of chalcedony, which is microcrystalline quartz) specimens identified by the Rock Identifier community.
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Green polished gemstone (likely chrysoprase or aventurine)
Chrysoprase: microcrystalline quartz, SiO₂, colored by nickel; possible aventurine quartz: SiO₂ with fuchsite mica
gemstone
Likely tumbled quartz/chalcedony pebble
Quartz (SiO₂), possibly microcrystalline chalcedony
mineral
Tumbled chalcedony (likely mossy/inclusion-rich variety)
Chalcedony, microcrystalline quartz (SiO₂)
mineral
Blue Lace Agate
Microcrystalline Quartz (Chalcedony), SiO2
mineral
Gray chalcedony (microcrystalline quartz)
Chalcedony, SiO₂; likely common gray/blue-gray variety
mineral
Tumbled jasper or iron-rich chert
Microcrystalline quartz (SiO₂), likely colored by iron oxides
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Chert (Chalcedony/Agate variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chalcedony (likely blue agate) knapped into an arrowhead
Microcrystalline quartz, SiO₂ (chalcedony)
mineral
Honey-colored chalcedony (rough agate/chert)
Microcrystalline quartz, SiO₂; likely chalcedony with iron-oxide staining
mineral
Polished agate or chalcedony pebble
Microcrystalline quartz, SiO₂ (chalcedony; exact identification uncertain from the image)
mineral
Green tumbled agate (likely green chalcedony)
Chalcedony, microcrystalline quartz (SiO₂); exact identification is uncertain from the photo
mineral
Flint Pebble
SiO2 (Microcrystalline Quartz / Chalcedony)
sedimentary
Carnelian
Carnelian (Silicon Dioxide, SiO2)
mineral
Tumbled orange chalcedony or carnelian
Microcrystalline quartz, SiO₂; orange variety commonly called carnelian
gemstone
Blue Agate
Chalcedony (SiO2)
mineral
Banded agate geode fragment
Microcrystalline quartz (chalcedony), SiO₂
mineral
Red jasper (likely polished/tumbled)
Jasper, microcrystalline quartz/chalcedony (SiO₂) colored by iron oxides
mineral
Tumbled jasper or chert pebble
Microcrystalline quartz, mainly SiO₂, likely jasper/chert
mineral
Tumbled jasper or chert
Microcrystalline quartz (SiO₂), likely opaque chalcedony/jasper
mineral
Polished brecciated jasper (likely dragon-blood or leopard jasper)
Jasper, microcrystalline quartz (SiO₂) with iron-oxide inclusions
mineral
Tumbled yellow-orange jasper
Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides
mineral
Jasper pebble, likely brecciated jasper
Microcrystalline quartz (SiO₂), commonly with iron-oxide impurities
mineral
Polished banded jasper pebble
Jasper, a microcrystalline quartz variety (SiO₂), with iron-oxide and clay/mineral impurities
mineral
Red Jasper
Microcrystalline Quartz (Chalcedony), SiO2 with iron oxide inclusions
sedimentary
Blue Agate (Dyed or Treated Chalcedony)
Silicon Dioxide (SiO2), microcrystalline quartz variety
mineral
Blue Lace Agate
Silicon Dioxide (SiO2)
mineral
Agate (specifically Carnelian or Honey Agate)
Silicon Dioxide (SiO2)
Mineral
Banded Calcite (often sold as Caribbean Calcite or Mexican Onyx)
Calcium Carbonate (CaCO3)
mineral
Jasper
Chalcedony (Microcrystalline Quartz) - SiO2
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Tumbled pale quartz/chalcedony fragment
Quartz (SiO₂), possibly microcrystalline chalcedony
mineral
Dyed Agate
Silicon Dioxide (SiO2) - variety Chalcedony
mineral
Tumbled chalcedony (likely agate or jasper)
Microcrystalline quartz, SiO₂ (chalcedony)
mineral
Green Jasper
Jasper (variety of Microcrystalline Quartz, SiO2)
sedimentary
Tumbled agate/chalcedony
Microcrystalline quartz (SiO₂), likely banded chalcedony or agate
mineral
Banded Agate / Lace Agate
Agate (Silica/Quartz) - SiO2
mineral
Polished banded agate
Microcrystalline quartz (chalcedony), SiO₂
mineral
Tumbled yellow jasper or chalcedony
Microcrystalline quartz, SiO₂; likely iron-oxide-bearing jasper/chalcedony
mineral
Polished brown-green jasper
Jasper, microcrystalline quartz (SiO₂), commonly with iron-oxide and chlorite inclusions
mineral