Aventurine
Quartz containing inclusions of Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Category
Anthropogenic Specimen (Man Made)
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Polished blue-green glassy slag or coated mineral fragment
Most likely man-made colored glass/slag; exact composition cannot be determined visually
mineral
Cubic Zirconia (Man-made)
Cubic Zirconia (ZrO2) with Enamel and Metal Alloy
mineral
Slag (Industrial Glass/Byproduct)
Anthropogenic Vitreous Silicate
igneous (anthropogenic)
Iron Slag
Anthropogenic pyrometallurgical byproduct
igneous
Iron Slag
Anthropogenic pyrometallurgical residue
industrial byproduct
Slag (Industrial)
N/A (Anthropogenic Slag)
industrial by-product
Chert (Arrowhead/Projectile Point)
Microcrystalline quartz (SiO2)
sedimentary
Blue Chalcedony Cube
Silicon Dioxide (SiO2)
mineral
Diamond (in a jewelry setting)
Carbon (C)
mineral
Asphalt Chunk
Asphalt concrete
man-made composite
Man-made Jewelry (Metal and Glass/Plastic)
Synthetic Alloy and Amorphous Solid (SiO2/Polymer)
not a rock
Cardstock (Paper)
Cellulose (C6H10O5)n
sedimentary (man-made)
Polished blue calcite sphere (tentative identification)
Calcite, CaCO₃; blue color generally results from trace impurities or inclusions
mineral
Chert (Arrowhead/Projectile Point)
Microcrystalline quartz (SiO2)
sedimentary
Chert (Arrowhead)
Chert (SiO2)
sedimentary
Note: This is a Man-Made Object (Costume/Prop Patch)
Synthetic fiber and pigments (Cellulose/Plastic-based composite)
Non-geological
Clay Brick
Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)
metamorphic (man-made/anthropogenic)
Synthetic Resin (Artificial Specimen)
Polyurethane or Polyester Resin
mineraloid (man-made)
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with synthetic dye
mineral
Dyed Dragon Vein Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Diamond (as set in a gold ring)
Carbon (C)
mineral
Chert (Arrowhead/Artifact Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Sea Glass (Turquoise/Aqua)
Amorphous Silica (SiO2) with transition metal dopants
Anthropogenic (Man-made material processed by nature)
Blue slag glass or dyed glass-like industrial material
Amorphous silicate glass; likely copper-bearing blue slag, but possibly colored man-made glass
mineral
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
Paper (Cellulose)
Cellulose (C6H10O5)n
Organic (Anthropogenic)
Sea Glass
Amorphous silicon dioxide (Man-made glass weathered by nature)
mineral
Chert (Arrowhead Artifact)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead (Lithic Artifact)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
sedimentary
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide)
igneous
Goldstone (with Tiger's Eye and Quartz)
Aventurine glass (Synthetic SiO2 with Cu inclusions)
mineral
Blue Impression Jasper beads
Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions
gemstone
Chert (Arrowhead artifact)
Chert (Cryptocrystalline Silica, SiO2)
sedimentary
Grooved Maun Ball (Maul/Hammerstone-like Concretion)
Calcareous/Ferruginous Concretion in Sandstone Matrix
sedimentary
Corundum (Sapphire/Ruby in Matrix)
Corundum (Al2O3)
mineral
Land Snail Shell
Gastropoda (Calcium Carbonate, CaCO3)
fossil
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Diamond (Cut and Polished)
Diamond (pure Carbon, C)
gemstone
Diamond (as featured in jewelry)
Diamond (C - pure carbon)
mineral