Malachite
Malachite (Cu2CO3(OH)2)
mineral
Category
Mineral (Man Made Glass)
Browse mineral (man made glass) specimens identified by the Rock Identifier community.
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Faceted gemstone in a jewelry setting
Indeterminate from image; likely quartz, cubic zirconia, or another transparent faceted stone
gemstone
Sandstone
Arenite
sedimentary
Blue faceted gemstone ring, likely synthetic sapphire or blue topaz
Uncertain from image; possible corundum (Al₂O₃) or topaz (Al₂SiO₄(F,OH)₂)
gemstone
Chert (with nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Red Quartzite
Quartzite (Metamorphic quartz sandstone)
metamorphic
Graphite
Graphite (Carbon, C)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Granodiorite / Granite (Weathered)
Granodiorite
Igneous
Polished brown chalcedony (likely carnelian or jasper)
Microcrystalline quartz, SiO₂; iron oxides produce the brown coloration
mineral
Brecciated Jasper
Brecciated Jasper (Microcrystalline Quartz / SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Diamond
C (Pure Carbon)
gemstone
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Quartzite (River Pebble)
Quartzite (Mainly SiO2)
metamorphic
Heart-shaped faceted gemstone pendant
Likely yellow quartz (citrine) or synthetic yellow stone, set in metal with small clear accent stones
gemstone
Red Sandstone
Quartz Arenite (iron-stained) / SiO2
sedimentary
Sandstone
Arenite
sedimentary
Diamond (in Jewelry)
Carbon (C)
mineral
Aura Quartz (Anomalously Coated Quartz)
Silicon Dioxide (SiO2) treated with vaporized metals
mineral
Chert
Microcrystalline quartz (SiO2)
sedimentary
Polished yellow calcite
Calcite (calcium carbonate, CaCO₃)
mineral
Chalcedony / milky quartz flake
Microcrystalline quartz (SiO₂), likely chalcedony; possibly a worked quartzite or chert fragment
mineral
Quartz Sandstone Pebble
Sandstone (SiO2 dominated)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Vesicular Basalt (or Scoria)
Vesicular Basalt
igneous
Green cabochon gemstone, likely aventurine or dyed chalcedony
Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony
gemstone
Chert
Microcrystalline quartz (SiO2)
sedimentary
Chert (Black Chert or Flint)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
sedimentary
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Asphalt (Bituminous Concrete)
Composite material (bitumen binder with mineral aggregate)
man-made rock (technosol)
Polished orbicular jasper (likely ocean jasper)
Siliceous microcrystalline quartz/chalcedony with iron-oxide and volcanic inclusions; commonly called ocean jasper
mineral
Chert (Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Tumbled quartz-rich pebble
Microcrystalline quartz (SiO₂), possibly milky quartz or quartzite
mineral
Blue-green chrysocolla rough specimen
Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite
mineral
Quartzite
Silica (SiO2) quartzite
metamorphic
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Quartzite
Quartzite (Metamorphic Quartz Sandstone)
metamorphic
Flint / Chert
Microcrystalline quartz (SiO2)
sedimentary