Synthetic Marbled Aggregate (Footwear Component)
Ethylene-vinyl acetate (Croslite™)
not a rock (man-made polymer)
Category
Mineraloid (Synthetic)
Browse mineraloid (synthetic) specimens identified by the Rock Identifier community.
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Blue Goldstone
Aventurine Glass
Man-made mineral simulant (Glass)
Silicon Carbide (Carborundum)
Moissanite (SiC), though mostly synthetic
mineral
Lapidary Wax (imitation/wax model)
Hydrocarbon wax blend with colorant (imitating Lapis Lazuli/Emerald)
mineral
Limonite (Iron Ore)
Limonite; FeO(OH)·nH2O
mineral
Colorless Gemstone (possibly Diamond or Cubic Zirconia)
C (Diamond) or ZrO2 (Cubic Zirconia)
gemstone
Pearl and Garnet Glass
Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass
mineral and glass
Obsidian
Obsidian (volcanic glass), primarily SiO2 (silicon dioxide)
igneous
Obsidian
Volcanic glass (mainly SiO2 with inclusions)
igneous
Mahogany Obsidian
Volcanic glass containing Hematite or Magnetite (SiO2 + Fe2O3)
igneous
Limonite (Iron Stone/Ocher)
Limonite (FeO(OH)·nH2O)
mineral
Obsidian
Obsidian (Volcanic Glass)
igneous
Snowflake Obsidian
Spherulitic Volcanic Glass (primarily SiO2 with Cristobalite inclusions)
igneous
Obsidian
Amorphous volcanic glass (primarily SiO2)
igneous
Limonite/Goethite on Shale
Hydrous ferric oxides (FeO(OH)·nH2O) often associated with argillaceous rock
sedimentary
Snowflake Obsidian
Volcanic Glass with Cristobalite inclusions (70–75% SiO2)
Igneous
Black Obsidian
Obsidian (Amorphous Silicon Dioxide)
igneous
Snowflake Obsidian
Volcanic Glass with Cristobalite Inclusions
igneous
Sapphire
Corundum (Al2O3)
gemstone
Aura Quartz
Silicon Dioxide (SiO2) with Titanium/Metal vapor coating
mineral
Dalmatian Stone
Dalmatian Jasper (a misnomer) / Perthitic Feldspar Rock
igneous
Diamond (Faceted Colorless)
Diamond (Pure Carbon, C)
mineral
Common Opal in Host Rock
Hydrated Silica (SiO2·nH2O)
mineraloid
Common Opal
Hydrated Amorphous Silica (SiO2·nH2O)
mineraloid
Amber
Fossilized Tree Resin (Succinite)
mineraloid
Amber
Succinite (Resinite)
mineraloid
Amber with Organic Inclusions
Succinite (fossilized resin)
mineraloid
Obsidian
Obsidian (Volcanic Glass)
igneous
Mahogany Obsidian
Obsidian (volcanic glass with hematite/magnetite inclusions)
igneous
Black Obsidian
Obsidian (Volcanic Glass, SiO2+)
igneous
Snowflake Obsidian
Spherulitic Volcanic Glass (primarily SiO2)
igneous
Limonite (Yellow Ochre)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
mineral
Black Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
igneous
Limonite (Yellow Ochre)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
mineral
Limonite/Goethite Concretion
Hydrated Iron(III) Oxide-hydroxide (FeO(OH)·nH2O)
sedimentary
Obsidian
Obsidian (Volcanic Glass)
igneous
Limonite (Ironstone)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
mineral
Limonite (Iron Ore)
Limonite (Hydrated iron oxide - FeO(OH)·nH2O)
mineral
Common Opal
SiO2·nH2O (Hydrated Silicon Dioxide)
mineraloid
Green Opal
Hydrated amorphous silica (SiO2·nH2O)
mineraloid
Amber (Copal)
Succiniferous Resin
mineraloid
Amber
Succinate (Fossilized Tree Resin)
mineraloid