Jasper Marble
Silicon Dioxide (SiO2) with Impurities
sedimentary
Category
Antropogenic (Man Made Glass Byproduct)
Browse antropogenic (man made glass byproduct) specimens identified by the Rock Identifier community.
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Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Tumbled brown chalcedony or agate
Microcrystalline quartz (SiO₂), likely chalcedony; possibly iron-stained jasper or agate
gemstone
Rounded quartz pebble
Quartz (silicon dioxide, SiO₂)
mineral
Polished black stone sphere, likely obsidian
Obsidian — naturally occurring volcanic glass, chiefly silica-rich rhyolitic glass
igneous
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Likely flint (dark chert)
Microcrystalline quartz (SiO₂), commonly called chert or flint
sedimentary
Blue faceted gemstone ring, likely synthetic sapphire or blue topaz
Uncertain from image; possible corundum (Al₂O₃) or topaz (Al₂SiO₄(F,OH)₂)
gemstone
Faceted gemstone in a jewelry setting
Indeterminate from image; likely quartz, cubic zirconia, or another transparent faceted stone
gemstone
Quartzite
Metamorphic Quartz Arenite
metamorphic
Likely river-worn chert (flint) pebble
Microcrystalline quartz (SiO₂), commonly called chert or flint
sedimentary
Faceted transparent gemstone pendant
Uncertain from image; likely faceted quartz (SiO₂), cubic zirconia (ZrO₂), or glass imitation
gemstone
Quartz (likely Chalcedony or Chert)
Silicon Dioxide (SiO2)
mineral
Chalcedony (possibly agate)
Microcrystalline quartz, SiO₂; agate is banded chalcedony
mineral
Tumbled chalcedony (likely moss or dendritic agate)
Microcrystalline quartz, SiO₂, with iron-oxide inclusions
mineral
Jasper / Chert (Red)
Cryptocrystalline quartz (SiO2)
Sedimentary / Mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Chert / Flint Variety)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
sedimentary
Obsidian
Obsidian (Volcanic Glass)
igneous
Tumbled chalcedony or quartz pebble
Microcrystalline quartz, SiO₂ (likely chalcedony); exact identification is uncertain from the image
mineral
Tumbled obsidian
Volcanic glass; chiefly SiO₂, noncrystalline
igneous
Chert (Cherty Shale / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartzite (River Pebble)
Quartzite (Mainly SiO2)
metamorphic
Chert
Microcrystalline silica (SiO2)
sedimentary
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Flint / Chert Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Chert (and Agate/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Green cabochon gemstone, likely aventurine or dyed chalcedony
Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony
gemstone
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Obsidian
Volcanic Glass (Amorphous SiO2)
igneous
Goldstone and Aura Quartz
Cuprous Glass (Goldstone) and Titanium-coated SiO2 (Aura Quartz)
Mineral/Glass Specimen
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Silica (SiO2) quartzite
metamorphic
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint / Jasper)
Silicon Dioxide (SiO2)
sedimentary
Red Quartzite
Quartzite (Metamorphosed Quartz Arenite)
metamorphic
Heart-shaped faceted gemstone pendant
Likely yellow quartz (citrine) or synthetic yellow stone, set in metal with small clear accent stones
gemstone
Chert
Microcrystalline Quartz (SiO2)
sedimentary