Quartz Druze on Matrix (Geode Fragment)
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Sedimentary Like (Industrial Composite)
Browse sedimentary like (industrial composite) specimens identified by the Rock Identifier community.
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Limestone Cobble
Carbonate Rock (CaCO3)
sedimentary
Cobalt Blue Glass / Cullet Glass
Silicon dioxide (Amorphous man-made glass)
mineral
Slag (Industrial By-product)
Anthropogenic Vitreous Silica/Iron Silicate
mineral
Banded Calcite (variety Honey Calcite / Chocolate Calcite)
Calcium Carbonate (CaCO3)
mineral
Diamond (or Simulant)
Carbon (C) or Cubic Zirconia (ZrO2)
gemstone
Red Jasper
Chalcedony/Quartz (SiO2) with iron inclusions
mineral
Blue Sapphire
Corundum (Al2O3) with iron and titanium impurities
mineral
Titanium Coated Kyanite (Aura Kyanite)
Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating
metamorphic
Synthetic Costume Accessory (Non-Geological)
Polyester and Acrylic Fiber (Anthropogenic polymer)
Synthetic / Man-made textile
Muscovite Schist
Muscovite (KAl2(AlSi3O10)(OH)2) in Schist
metamorphic
Crushed Stone Ballast
Crushed Limestone or Granite Aggregate
sedimentary
Pyrope Garnet
Magnesium aluminum silicate (Mg3Al2Si3O12)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral / Sedimentary component
Red Quartz (Druzy)
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
Metamorphic
Pumice
Pumice (a highly vesicular, silicic volcanic rock)
igneous
Pumice
Pumice (volcanic glass froth)
igneous
Agate Geode
Silicon Dioxide (SiO2)
mineral
Yellow Chalcedony (Carnelian/Yellow Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Mineral
Orange calcite
Calcite (CaCO₃), likely honey/orange calcite
mineral
Diamond (likely facet or crystal shard)
Diamond (C)
mineral
Dyed Agate
Cryptocrystalline variety of Silica (SiO2)
gemstone
Banded Chert in Matrix
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Sandstone (clastic sedimentary rock)
Rock
Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Man-made earbud charging case (Not a rock or mineral)
Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components
Synthetic/Man-made object
Coal (Anthracite or Bituminous)
Carbo caulis / Sedimentary Carbon
sedimentary
Coal
Bituminous coal (Complex organic sedimentary rock)
sedimentary
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Yellow Sapphire (Corundum)
Corundum (Aluminum Oxide, Al2O3)
mineral
Chalcedony (Botryoidal or Tumbled)
Chalcedony (SiO₂)
mineral
Diamond (or Diamond Simulant/Cubic Zirconia)
Carbon (C) - if diamond, or Zirconium dioxide (ZrO2) - if Cubic Zirconia
mineral
Kyanite (within Quartz)
Kyanite (Al2SiO5) in crystalline Quartz base (SiO2)
metamorphic
Jasper (Milky/Cream Variety)
Silicon Dioxide (SiO2) - variety of Chalcedony
sedimentary (chemical/biological)
Granite Gravel (Pebble)
Intrusive Felsic Igneous Rock
igneous
Ferrous Slag (Iron Smelting By-product)
Fused Siliceous Slag
Anthropogenic Material (Man-made Rock)
Chert (White Chert / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
sedimentary
Mica Schist
Muscovite/Biotite Schist
metamorphic
Agate (specifically a Blue Agate Geode Slice)
Chalcedony (cryptocrystalline variety of Quartz); SiO2
mineral
Kyanite
Kyanite (Al2SiO5)
mineral