Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral (synthetic)
Category
Man Made Composite (Lithified Equivalent Of Sedimentary)
Browse man made composite (lithified equivalent of sedimentary) specimens identified by the Rock Identifier community.
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Slag (Industrial Glass/Glassy Rock)
Anthropogenic Vitreous Material
igneous
Aura Quartz
Titanium/Titanium-Gold treated Silicon Dioxide (SiO2)
mineral
Sea Glass (White/Clear)
Amorphous Silica (Alkali-Lime-Silica Glass), SiO2 + Na2O + CaO
Anthropogenic (Man-made product subject to geological processes)
Red Slag Glass
Amorphous Silica (Industrial byproduct with metallic oxide dopants)
Mineraloid / Industrial Byproduct
Granite with Cupules / Bedrock Mortars
Granite (felsic intrusive plutonic rock)
igneous
Goldstone
Aventurine Glass (Man-made glass with copper inclusions)
mineraloid / man-made glass
Blue Goldstone
Man-made glass with suspended copper, cobalt, or manganese particles
man-made glass
Green Glass (often marketed as 'Obsidian' or 'Green Quartz')
Amorphous Silica (SiO2) with copper or chromium additives
Mineraloid (Man-made)
Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)
Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)
mineraloid / industrial byproduct
Sandstone
Sandstone (lithified sand)
sedimentary
River Stone / Siltstone
Siltstone (composed of lithified silt)
sedimentary
Blue Crackle Quartz (Dyed Quarzite)
Silicon Dioxide (SiO2) with artificial dye
Metamorphic (modified)
Dyed Blue Agate (Dragon Vein Agate)
Silicon Dioxide (SiO2) with artificial cobalt/organic dyes
mineral
Diamond
Native Carbon (C)
mineral
Dyed Aura Quartz
Silicon Dioxide (SiO2) with metallic coating
mineral
Conglomerate
Conglomerate (SiO2 matrix with various silicate clasts)
sedimentary
Goldstone (Red)
Aventurine Glass (SiO2 + Cu)
Synthetic Glass (Often categorized as a simulated mineral)
Ferro-slag (Leland Blue/Slag Glass)
Anthropogenic Vitreous Silica (Industrial Slag)
igneous
Blue Obsidian (Cullet Glass)
Silicon Dioxide (Amorphous Glass)
mineral
Blue Obsidian
Volcanic Glass (SiO2 with inclusions)
igneous
Green glass sphere/marble
Soda-lime glass (primarily SiO2, Na2O, CaO)
Man-made object (Simulant)
Sandstone
Sandstone (clastic sedimentary rock composite)
sedimentary
Rainbow Hematite (Man-made/Treated)
Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)
mineral
Rounded river cobble, likely weathered sandstone or siltstone
Quartz-rich clastic sedimentary rock; exact identification requires a fresh surface and testing
sedimentary
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
gemstone
Sea Glass
Man-made vitreous material (silica-based glass)
mineral
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
mineral
Goldstone (Brown/Gold)
Aventurine Glass (Man-made glass with Copper inclusions)
gemstone
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Opalite
Synthetic Opalised Glass
Mineral (Synthetic / Man-made)
Carborundum
Silicon Carbide (SiC)
mineral
Carborundum (Silicon Carbide)
Silicon Carbide (SiC) / Moissanite (natural form)
mineral
Conglomerate
Conglomerate (SiO2 matrix with various lithic clasts)
sedimentary
Cullet (Slag Glass)
Amorphous Silica (Industrial byproduct)
mineraloid
Pink Cubic Zirconia (CZ)
Zirconium Dioxide (ZrO2)
mineral (synthetic)
Opalite
Synthetic glass (SiO2 + metal additions)
mineraloid
Opalite (Man-made Glass)
Fused glass (typically made of dolomite and metal opacifiers)
Man-made Material / Glass
Sandstone
Arenite (typically composed of SiO2)
sedimentary
Cobalt Glass Slug (Cullet)
Man-made Silicate Glass with Cobalt Oxide (CoO)
mineraloid
Raw quartz crystal
Quartz (silicon dioxide, SiO₂), likely milky or included quartz
mineral
Pebble
Lithified rock fragment / Sedimentary clast
sedimentary