Blue Goldstone
Aventurine Glass
Man-made glass (often grouped with minerals in lapidary)
Category
Man Made Object (Coin)
Browse man made object (coin) specimens identified by the Rock Identifier community.
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Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
mineral
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Ferrochrome Slag
Anthropogenic slag (Fe-Cr alloy waste)
industrial byproduct
Concrete with Aggregate
Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)
anthropogenic (human-made) sedimentary-like material
Goldstone (Red)
Aventurine Glass (Cupriferous glass)
Synthetic Glass (Man-made)
Diamond / Clear Quartz / Glass paste
Carbon (Diamond) / Silicon Dioxide (Quartz)
gemstone
Opalite
Synthetic Glass (Simulated Moonstone/Opal)
gemstone
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
mineral
Goldstone
Aventurine glass (Synthetic glass with copper inclusions)
mineraloid / man-made glass
Sea Glass (Uranium/Vaseline Glass variant)
Silicon Dioxide (SiO2) with trace Uranium Oxide (U3O8)
man-made silicate (anthropogenic glass)
Goldstone (Brown/Gold variety)
Aventurine Glass (SiO2 with Copper inclusions)
Synthetic/Man-made glass (often mistaken for a mineral)
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Opalite
Man-made opalescent glass (SiO2 + metal oxides)
mineral (synthetic)
Banded Calcite (often commercially sold as 'Mexican Onyx' or 'Honey Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Fluorite (Polished Point/Tower)
Calcium Fluoride (CaF2)
mineral
Blue Goldstone
Goldstone (artificial glass)
Mineral (man-made glass, not natural)
Polished black stone, likely black obsidian
Obsidian (volcanic glass), chiefly silica-rich rhyolitic composition
igneous
Sandstone Anvil / Nutting Stone
Quartzose Sandstone (Sedimentary Rock)
sedimentary
Pink Tumbled Quartz (Dyed)
Silicon Dioxide (SiO2)
mineral
Dyed Crackle Quartz (Green)
Quenching-treated Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite (Engineered Stone)
Silicon Dioxide (SiO2) based synthetic composite
metamorphic
Chert Concretion (with typical hematite/limonite staining)
Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)
sedimentary
Sandstone Concretion
Clastic Sedimentary Rock (primarily SiO2 with mineral cement)
sedimentary
Pyrite Concretion (Grapestone)
Iron Sulfide (FeS2) Concretion
sedimentary
Green Fluorite (Botryoidal/Massive)
Calcium Fluoride (CaF2)
mineral
Common Marble
Calcium Carbonate (CaCO3)
metamorphic
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Aura Quartz (Titanium/Gold coated)
Silicon Dioxide (SiO2) with metallic vapor deposition
mineral
Iron Slag
Iron/Steel Slag (Ferrosilicate Glass)
industrial byproduct (anthropogenic material)
Iron Slag (Industrial Byproduct)
Anthropogenic Vitrification Product/Ferrous Slag
Mineral-like Industrial Smelting Waste
Cubic Zirconia (Simulated Diamond)
Cubic Zirconia (ZrO2)
mineral
Opalite
Synthetic Opalized Glass
mineraloid (man-made)
Opalite
Synthetic Opalite Glass (Silicon Dioxide)
mineraloid (man-made)
Blue Glass or Slag Glass
Amorphous Silica (Anthropogenic Glass)
mineral
Slag Glass
SiO2 (Silicon Dioxide) with impurities
man-made glass
Opalite
Synthetic Glass, SiO2 base with metallic inclusions
mineraloid (synthetic)
Black Obsidian
Amorphous volcanic glass (SiO2 + impurities)
igneous
Conglomerate
Conglomerate Rock (Paraconglomerate)
sedimentary
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Slag
Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)
igneous (artificial/anthropogenic)
Titanium Amethyst Geode
Silicon Dioxide (SiO2) with Titanium/Metal Vapor Deposition Layer
mineral