Gold
Native Gold (Au)
mineral
Category
Mineral Based Alloy (Anthropogenic)
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
Learn about Mineral Based Alloy (Anthropogenic) in the encyclopedia
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Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Moss Agate
Silicon Dioxide (SiO2) with Chlorite/Hornblende inclusions
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron
mineral
Chrysocolla in Matrix
Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Sandstone
Sandstone (Silicon dioxide, SiO2 based)
sedimentary
Conglomerate
Conglomerate
sedimentary
Sandstone Beach Pebble
Clastic sedimentary rock (SiO2 with iron oxide cement)
sedimentary
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Slag
Metallurgical by-product
Anthropogenic (Man-made material)
Diamond (Princess Cut Faceted Gemstone)
Native Carbon (C)
mineral
Amethyst
Silicon Dioxide with iron impurities (SiO2)
mineral
Sandstone (Arkose/Quartzose)
Arenite (SiO2 based clastic rock)
sedimentary
Rough Diamond
Diamond (pure Carbon, C)
mineral
Milky Quartz with Hematite inclusions
Silicon Dioxide (SiO2)
mineral
Blue Quartzite
Quartzite (silicon dioxide, SiO2)
metamorphic
Green Moss Agate
Silicon Dioxide (SiO2) with Mineral Inclusions
sedimentary
Sandstone (Red Sandstone)
Arenite (SiO2 based with Fe2O3 staining)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon Dioxide (SiO2)
mineral
Smoky Quartz Cluster
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Epidote
Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
Mineral
Sandstone Pebble
Arenite (SiO2 based)
sedimentary
Quartzite pebble
Quartzite (SiO2 based)
metamorphic
Quartzite Cobble
Quartzite (SiO2 based)
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Gold Nugget
Gold (Au)
mineral
Gold
Gold (Au)
mineral
Rose Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Gold
Native Gold (Au)
mineral
Iridescent bismuth crystal
Bismuth (Bi), commonly laboratory-grown
mineral
Aquamarine
Beryl (Be₃Al₂Si‑₆O₁₈)
mineral
Aquamarine
Beryl (Be₃Al₂Si₆O₁₈)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Quartz / Quartz Cluster
Silicon Dioxide (SiO2)
mineral
Sparkling Druzy Quartz on Matrix
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (Chert or Flint)
sedimentary
Chert (Arrowhead/Projectile Point)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Chert (Arrowhead/Projectile Point)
Cryptocrystalline Quartz (SiO2)
sedimentary