Crescent Pebble
Weathered Quartzite or Sandstone Fragment
sedimentary
Category
Man Made Material (Anthro Lithic Product)
Browse man made material (anthro lithic product) specimens identified by the Rock Identifier community.
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Chert Concretion
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert (often called Flint when dark or worked)
Cryptocrystalline silica (SiO2)
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Bismuth
Bismuth (Bi)
mineral
Slag
Metallurgical Slag
igneous
Pink Quartz / Sea Glass
Silicon Dioxide (SiO2)
mineral
Obsidian (Blue)
Volcanic Glass (SiO2)
igneous
Blue Cracked Quartz (Dyed Fire Crackle Quartz)
Silicon Dioxide (SiO2) with synthetic dye
mineral
Clear quartz sphere
Quartz (silicon dioxide, SiO₂)
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Chert / Chalcedony
Microcrystalline Quartz (SiO2)
sedimentary
Aura Quartz (Titanium/Gold coated)
Silicon Dioxide (SiO2) with metallic vapor deposition
mineral
Pumice
Pumice (Vesicular volcanic glass)
Igneous
Rhyolitic Tuff
Rhyolitic Tuff / Pyroclastic rock
igneous
Greenstone / Epidosite
Epidosite (Metasomatic rock consisting mainly of Epidite Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz)
metamorphic
Opalite
Synthetic Opalised Glass
mineral
Cubic Zirconia (Diamond Simulant)
Zirconium Dioxide (ZrO2)
gemstone
Rainbow Hematite (Titanium Coated)
Iron(III) oxide (Fe2O3) with Titanium/Metal Oxide coating
mineral
Mystic Topaz
Aluminum Silicate Fluoride Hydroxide (Al2SiO4(F,OH)2) with metallic film coating
mineral
Chert (specifically Flint or Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Agatized/Banded)
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
Opalite
Synthetic Glass / Man-made Opal Simulant
gemstone
Opalite
Man-made Glass (Synthetic Opalized Glass)
gemstone
Opalite (Man-made Glass)
Synthetic Opalised Glass
mineral
Opalite (a synthetic glass, often confused with Opal)
Silicon dioxide glass (SiO2nH2O, for natural opal)
Synthetic (glass)
Carved Stone Turtle
Carved Soapstone and Quartz
mineral
Man-made Ceramic / Clay Figurine
Aluminosilicate Ceramic (Processed Clay)
Synthetic (not a rock or mineral)
Sandstone (Greywacke/Lithic Sandstone)
Arenite / Lithic Sandstone
sedimentary
Greywacke
Lithic Sandstone (Greywacke)
sedimentary
Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
mineral
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Chalk
Calcium Carbonate (CaCO3)
sedimentary
Fired Clay Brick (Anthropic Rock substitute)
Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)
metamorphic (man-made / anthropic)
Ferrochrome Slag
Anthropogenic slag (Fe-Cr alloy waste)
industrial byproduct
Terrazzo (with Marble and Granite fragments)
Cementitious or resinous composite containing Calcium Carbonate (CaCO3) and Silicates
sedimentary (man-made composite)
Graywacke
Lithic Sandstone (Graywacke)
sedimentary
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
mineral
Ferrous Slag (Iron Smelting By-product)
Fused Siliceous Slag
Anthropogenic Material (Man-made Rock)
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Man-made Metal Pin (Non-geological)
Antimony-Lead Alloy or Zinc/Brass Base with Electroplating
Metal Alloy / Manufactured Artifact
Chert (specifically as a lithic artifact/projectile point)
Chert (Silicon dioxide, SiO2)
sedimentary