Flint
Chert (SiO2)
sedimentary
Category
Man Made Material (Jewelry, Metal Alloy)
Browse man made material (jewelry, metal alloy) specimens identified by the Rock Identifier community.
Learn about Man Made Material (Jewelry, Metal Alloy) in the encyclopedia
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Petrified Wood (Agatized/Silicified Wood)
Silicified Wood (SiO2)
metamorphic
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Tumbled smoky quartz
Quartz, silicon dioxide (SiO₂), smoky variety
mineral
Chiastolite
Andalusite (Al2SiO5) with carbonaceous inclusions
metamorphic
Chert (specifically Flint or Common Chert)
Silicon Dioxide (SiO2)
sedimentary
Greenstone
Metabasalt / Greenschist facies rock
metamorphic
Pink Jade (Dyed Quartzite)
Silicon Dioxide (SiO2) - primarily Quartzite or Quartz
metamorphic
Diamond
C (Carbon)
mineral
Chert (and Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Wood Beads (Palmwood/Ebony)
Various species for wood, but often refers to woods like Palmwood (e.g., Borassus flabellifer) or Ebony (Diospyros spp.) for their distinctive grain and hardness.
Organic Gem Material (Botanical)
Chert (varieties: Flint or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Citrine
Silicon Dioxide (SiO2)
mineral
Turquoise in Matrix
Hydrated copper aluminum phosphate, CuAl6(PO4)4(OH)8·4H2O
mineral
Red Jasper
Microcrystalline Quartz (Chalcedony), SiO2 with iron oxide inclusions
sedimentary
Fossilized Coral
Anthozoa (Fossilized)
Sedimentary / Fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Chert (or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Grey Jasper (Tumbled Quartz variant)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Tumbled Rose Quartz
Silicon Dioxide (SiO2)
mineral
Ruby (Raw Corundum)
Corundum (Al2O3 with Chromium impurities)
mineral
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Chalcedony / Gray Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nHeO)
mineral
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Yellow Jade
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
gemstone
Bloodstone
Heliotrope (cryptocrystalline Quartz, SiO2 with inclusions of Hematite)
sedimentary
Rounded quartz-rich pebble
Likely microcrystalline quartz (SiO₂), possibly milky quartz or a pale quartzite fragment
mineral
Heat-Treated Citrine
Silicon Dioxide (SiO2) with iron impurities
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Diamond
Carbon (C)
gemstone
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Banded Calcite (often sold as 'Mexican Onyx')
Calcite (Calcium Carbonate - CaCO3)
sedimentary
Banded Calcite (often sold as 'Green Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Chert (often called Flint or Jasper when pigmented)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Tumbled green-yellow stone, likely serpentine or nephrite jade
Serpentine-group mineral aggregate, commonly lizardite/antigorite; possible nephrite (interlocking tremolite-actinolite)
metamorphic
Tumbled yellow quartz or calcite pebble
Quartz (SiO₂) or calcite (CaCO₃); exact identification requires hardness or acid testing
mineral
Biotite-bearing granite or granitic gneiss
Quartz–feldspar–mica rock; chiefly quartz (SiO₂), feldspars, and biotite mica
igneous
Unidentified gray stone
Likely quartz-rich stone; exact identification is not possible from the image
mineral