Dyed Quartzite
Tumbled Metamorphosed Quartz (SiO2) with artificial pigment
metamorphic
Category
Sedimentary (Primary) With Artificial Modification
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
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Coal
Bituminous Coal
sedimentary
Tumbled carnelian/chalcedony
Carnelian, orange-red microcrystalline quartz (SiO₂), a variety of chalcedony
gemstone
Man-made Metal Pin (Non-geological)
Antimony-Lead Alloy or Zinc/Brass Base with Electroplating
Metal Alloy / Manufactured Artifact
Amethyst geode slices
Amethyst, purple quartz (SiO₂)
mineral
Turquoise (Blue Howlite / Magnesite imitation)
CuAl6(PO4)4(OH)8·4H2O (for natural Turquoise); Ca2B5SiO9(OH)5 (for Howlite)
mineral
Dyed Agate
SiO2 (Silicon Dioxide) - Chalcedony variety
Mineral
Green Chalcedony (likely Green Agate or Chrysoprase)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Mineral
Red jasper (tumbled)
Jasper, microcrystalline quartz/chalcedony (SiO₂) colored mainly by iron oxides
mineral
Pink Dyed Agate
Silicon Dioxide (SiO2) - Variety Agate
mineral
Red Tigers Eye (Bull's Eye)
SiO2
Mineral
Yellow Quartz (Citrine type/Tumbled Quartz)
Silicon Dioxide (SiO2)
mineral
Blue goldstone beads
Man-made aventurine glass (silica glass with metallic copper inclusions), not natural lapis lazuli
mineral
Uncertain small metallic-looking mineral/rock fragment
Indeterminate; possibly galena-bearing rock or metallic slag
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled sandstone pebble
Sandstone, primarily quartz (SiO₂) with feldspar and iron-oxide cement
sedimentary
Coal
Combustible sedimentary rock
sedimentary
Small translucent tumbled crystal or gemstone
Indeterminate; likely quartz (SiO₂), possibly citrine or glass-like chalcedony
mineral
Tumbled chalcedony/agate (likely botryoidal variety)
Microcrystalline quartz, SiO₂; possibly druzy chalcedony or common agate
mineral
Polished river cobble, likely basalt or gabbro
Mafic igneous rock, probably basalt (plagioclase–pyroxene ± olivine)
igneous
Dyed Quartz (Candy Quartz / Aura Quartz Imitation)
Silicon Dioxide (SiO2)
mineral
Goldstone
Man-made glass containing cuprous oxide
gemstone
Goldstone
Man-made glass infused with copper particles
gemstone
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled Quartz
Silicon Dioxide (SiO2)
mineral
Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Limonite Concretion
Hydrated Iron Oxide-Hydroxide, FeO(OH)·nH2O
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Quartz with Inclusions
Silicon Dioxide (SiO2)
mineral
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Amethyst (Agate/Chalcedony variety)
Silicon Dioxide (SiO2) with iron impurities
mineral
Carnelian and Dyed Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Blue Agate (Dyed Chalcedony)
Silicon Dioxide (SiO2)
mineral
Bismuth
Native Bismuth (Bi)
mineral
Polished, carved gemstone (possibly dyed agate or glass-like material)
Unconfirmed from the image; no specific mineral can be identified reliably
gemstone
Dyed Purple Agate
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Lace Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral