Bloodstone (Heliotrope)
SiO2 (Cryptocrystalline Quartz / Chalcedony)
mineral
Category
Mineral (Specifically A Variety Of Chalcedony, Which Is A Cryptocrystalline Quartz)
Browse mineral (specifically a variety of chalcedony, which is a cryptocrystalline quartz) specimens identified by the Rock Identifier community.
Learn about Mineral (Specifically A Variety Of Chalcedony, Which Is A Cryptocrystalline Quartz) in the encyclopedia
View all →
Chalcedony Geode Fragment (Botryoidal)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Tumbled chalcedony (likely moss or dendritic agate)
Microcrystalline quartz, SiO₂, with iron-oxide inclusions
mineral
Tumbled Agate
Silicon Dioxide (SiO2)
mineral
Chalcedony (Tumbled)
Cryptocrystalline Quartz (SiO2)
mineral
Quartz
Quartz (SiO₂ - Silicon Dioxide)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Red jasper (likely tumbled)
Jasper, microcrystalline quartz/chalcedony (SiO₂), colored mainly by iron oxides
mineral
Brown Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Gray Agate with Druzy Quartz Geode
Cryptocrystalline Quartz (SiO2)
mineral
Flower Agate (Plume Agate)
Chalcedony (Silicon Dioxide) with Spherulitic Inclusions - SiO2
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Tumbled jasper (likely brecciated or orbicular jasper)
Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and other mineral inclusions
mineral
Agate Geode
Banded Chalcedony (Silicon Dioxide, SiO2) with Quartz crystals
mineral
Tree Agate
Dendritic Agate (Silicon Dioxide - SiO2)
mineral
Chalcedony (specifically Agate or Flint)
Silicon Dioxide (SiO₂)
Mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Chert
Microcrystalline quartz (SiO2)
sedimentary
Black Onyx
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Chalcedony Pebble
Cryptocrystalline Quartz (SiO2)
mineral
Citrine Quartz
Quartz (SiO2) - specifically, a variety of macrocrystalline quartz
Mineral
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral
Agate
Agate (Chalcedony), SiO2
Mineral
Geode
Quartz / Chalcedony nodule
sedimentary
Polished carnelian/chalcedony
Carnelian, a reddish-orange variety of microcrystalline quartz (SiO₂)
mineral
Jasper pebble (Yellow/Brown Jasper)
Silicon Dioxide (Microcrystalline Quartz, SiO2 with Iron Oxide impurities)
sedimentary
Orange Quartz (or Tumbled Carnelian)
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary
Red jasper (tumbled)
Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides
mineral
Banded agate (likely carnelian/chalcedony)
Microcrystalline quartz, SiO₂; chalcedony with iron-oxide coloration
mineral
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Flint Pebble
SiO2 (Microcrystalline Quartz / Chalcedony)
sedimentary
Black Onyx (Tumbled)
Silicon Dioxide (SiO2)
mineral
Yellow Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Polished brecciated jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide and possibly chlorite inclusions
mineral
Red jasper fragment
Jasper, microcrystalline quartz (SiO₂) colored chiefly by iron oxides
mineral
Tumbled carnelian/chalcedony
Chalcedony (microcrystalline quartz), SiO₂; reddish color from iron oxides
mineral
Banded Agate (specifically Moss Agate or Plume Agate variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Chert
Microcrystalline quartz (SiO2)
sedimentary
Honey-colored chalcedony (likely carnelian)
Microcrystalline quartz, SiO₂; orange chalcedony colored by iron oxides
mineral