Chert (specifically Black Chert / Flint)
Silicon Dioxide (SiO2)
sedimentary
Category
Mineral (Specifically A Cryptocrystalline Variety Of Quartz)
Browse mineral (specifically a cryptocrystalline variety of quartz) specimens identified by the Rock Identifier community.
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Agate (specifically Botswana or Banded Agate variety)
Chalcedony (Silicon Dioxide, SiO2)
mineral
Chert (Flint/Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Pebble
Lithified rock fragment / Sedimentary clast
sedimentary
Chert (vuggy variety)
Microcrystalline silica (SiO2)
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Red Chert/Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Light Variety)
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Chert (and Flint variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (specifically Flint or Gray Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Flint or Jasper variant)
Microcrystalline quartz (SiO2)
sedimentary
Blue Lace Agate (or similar Chalcedony)
SiO2 (Silicon Dioxide)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Gastly (Trick or Trade Halloween Series)
Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)
Mineral (Synthetic - Paper and Ink Polymorph)
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Gneiss (specifically Epidote-Quartz Gneiss)
Gneiss containing Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) and Quartz (SiO2)
metamorphic
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Carnelian (Carnelian Agate)
Carnelian (Silicon Dioxide - SiO2)
mineral
Carnelian
Carnelian (Silicon Dioxide - SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Citrine Quartz
Crystalline Quartz (SiO2) with iron impurities
mineral
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint Nodules)
Silicon Dioxide (SiO2)
sedimentary
Chert (varieties include Flint and Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Amethyst on Matrix
Amethyst (Silicon Dioxide, SiO2) with impurities of iron and irradiation
mineral
Serpentine (Serpentinite)
Antigorite, Lizardite, or Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Chert (Flint variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Milk Quartz (Common White Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (goethite)
sedimentary
Heliotrope (Bloodstone)
Chalcedony variety Quartz (SiO2) with hematite/chlorite inclusions
mineral
Chert (specifically Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz
SiO2 (Silicon Dioxide)
mineral
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) - a variety of Chalcedony (Cryptocrystalline Quartz)
Mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Tumbled Citrine
Silicon Dioxide (Quartz variety)
mineral
Quartz (likely Herkimer Diamond style)
Silicon Dioxide (SiO2)
mineral
Pyrite with Quartz
Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)
mineral