Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Category
Synthetic Or Natural Fiber
Browse synthetic or natural fiber specimens identified by the Rock Identifier community.
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Dragon Vein Agate
Chalcedony (cryptocrystalline Quartz), SiO2
mineral
Dyed Quartz (often sold as 'Blue Quartz' or 'Blue Agate')
Silicon Dioxide (SiO2) with artificial pigment
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Chromium-bearing Fuchsite
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Black Onyx
Onyx (Silicon Dioxide, SiO2)
mineral
Green Quartz (including Prase or Aventurine variants)
Silicon Dioxide (SiO2) with inclusions (likely Actinolite or Chlorite)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Herkimer Diamond
Quartz (Silicon Dioxide) - SiO2
mineral
Shungite (Noble/Type II)
Non-crystalline carbon (Fullerene-bearing carbonaceous rock)
metamorphic
Rough Sapphire (Corundum)
Corundum (Al2O3)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18)
mineral
Peach Moonstone (Orange/Peach Feldspar)
Potassium aluminum silicate (KAlSi3O8)
mineral
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Dyed Dalmatian Stone
Aplite (Alkali-feldspar granite) with Arfvedsonite
igneous
Shiva Lingam
Cryptocrystalline Quartz (Jasproid/Sandstone) with Iron Oxide (Fe2O3)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
Mineral
Carnelian and Dyed Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Blue Agate (Dyed Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Amethyst Quartz
Amethyst (Silicon Dioxide, SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz and Milky Quartz
Silicon Dioxide (SiO2)
mineral
Tektite (Indochinite)
Tektite (High-silica natural glass)
mineralogical glass/meteorite impactite
Fired Clay Brick (Anthropic Rock substitute)
Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)
metamorphic (man-made / anthropic)
Crackle Agate / Dyed Agate
Agate (Silicon dioxide / SiO2)
mineral
Yellow Topaz (Imperial or Precious Topaz)
Al2SiO4(F,OH)2 (Aluminum Silicate Fluoride Hydroxide)
mineral
Howlite
Howlite (Calcium borosilicate hydroxide, Ca2B5SiO9(OH)5)
mineral
Rough Diamond
Carbon (C)
mineral
Yellow Chalcedony (Jasper/Chert Pebble)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Wonderstone)
Silicified Sandstone / Orthoquartzite with Liesegang rings
sedimentary
Gold Nugget
Native Gold (Au)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Chert (White Variety)
Silicon Dioxide (SiO2)
sedimentary
Banded Sandstone (Water-worn Pebble)
Arenite with mineral banding
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Blue Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Jasper in Quartz (River Cobble)
Silicon Dioxide (SiO2) with Ferric Iron inclusions
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic