Desert Rose (Gypsum Rose)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Category
Man Made Object (Simulant)
Browse man made object (simulant) specimens identified by the Rock Identifier community.
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Fossilized Shark Tooth (Sand Tiger)
Carcharias sp. (Fossilized Tooth)
fossil
Chert (often called Flint or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Crinoid Stem Segment Fossil
Crinoidea (columnal ossicle)
fossil
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Amethyst
Silicon Dioxide (SiO2) with Fe3+ impurities
mineral
Chert (Jasper type)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Malachite
Malachite (Copper Carbonate Hydroxide) - Cu2CO3(OH)2
Mineral
Quartz (likely Chalcedony or Chert)
Silicon Dioxide (SiO2)
mineral
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
mineral
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Yooperlite (Syenite clast containing fluorescent Sodalite)
Sodalite-bearing Syenite
igneous
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Chert (Quartz Variety)
Chert (Silicon Dioxide, SiO2)
sedimentary
Hag Stone (Flint with natural hole)
Silicon Dioxide (SiO2) - Nodular Chert / Flint
sedimentary
Blue Slag Glass
Amorphous Silica (Industrial byproduct)
Antropogenic (Man-made glass byproduct)
Slag (Industrial Byproduct)
Ferro-silicate glass (Slag)
Anthropogenic (Man-made industrial deposit)
Goldstone (Red)
Aventurine Glass
Man-made material (Simulated Mineral)
Sea Glass (Frosted Glass)
Amorphous Silica (SiO2) with various additives
Man-made material (Anthropogenic 'mineraloid')
Diamond Plate (Steel)
Alloyed Carbon Steel or Aluminum with 'Durbar' pattern
not a rock (Man-made industrial metal)
Asphalt Chunk (with aggregate)
Bituminous concrete / Anthropogenic conglomerate
sedimentary (anthropogenic/man-made conglomerate)
Iron Slag
Ferrous slag (primarily silicates and oxides of calcium, iron, and magnesium)
Anthropogenic (Man-made industrial byproduct)
Green Aura Quartz (Titanium treated Kyanite or Quartz)
Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating
mineral (man-made aura treatment)
Slag
Ferrous Slag (Siliceous industrial waste)
Anthropogenic (Man-made industrial byproduct)
Coquina
Coquina (Bioclastic Limestone)
sedimentary
Optical Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (or Flint)
Chert (cryptocrystalline quartz), SiO2
Sedimentary
Quartz (Granular Milky Quartz fragment)
Silicon Dioxide (SiO2)
mineral
Orbicular jasper / brecciated jasper slab
Silicified volcanic rock composed mainly of microcrystalline quartz (SiO₂), with iron-oxide and possible chalcedony/agate bands
metamorphic
Green polished gemstone (likely chrysoprase or aventurine)
Chrysoprase: microcrystalline quartz, SiO₂, colored by nickel; possible aventurine quartz: SiO₂ with fuchsite mica
gemstone
Obsidian (black volcanic glass)
Obsidian; predominantly rhyolitic volcanic glass, mainly SiO₂ with minor feldspar, quartz, and iron oxides
igneous
Tumbled moss agate
Chalcedony (microcrystalline quartz, SiO₂) with moss-like inclusions
mineral
Polished carnelian/chalcedony agate
Microcrystalline quartz (SiO₂), chiefly chalcedony with iron-oxide coloring
mineral
Larvikite
Larvikite (anorthosite–monzonitic feldspathic rock; commonly rich in labradorite)
igneous
Red jasper (likely polished/tumbled)
Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides
mineral
Tumbled carnelian/chalcedony
Carnelian, a reddish variety of microcrystalline quartz (SiO₂)
gemstone
Tumbled jasper or quartzite pebble
Jasper (microcrystalline quartz, SiO₂), possibly iron-stained quartzite
metamorphic
Tumbled jasper, likely red/brown jasper
Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides
metamorphic
Tumbled blue sodalite
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂
mineral
Red jasper-like chalcedony pebble
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper
mineral