Diamond
Carbon (C)
gemstone
Category
Not A Rock (Man Made Polymer)
Browse not a rock (man made polymer) specimens identified by the Rock Identifier community.
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Rough Diamond
Native Carbon (C)
mineral
Diamond (in a cluster setting)
Crystallized Carbon (C)
mineral
Chalk
CaCO3 (primarily Calcium Carbonate), biogenic sedimentary rock
Sedimentary
Amber
Fossilized Tree Resin (C10H16O)
gemstone
Amber (Rough)
Succinite (Resinite)
gemstone
Amber
Succinite (approximate formula C10H16O)
mineraloid
Amber
Succinite (fossilized resin); C10H16O
mineraloid
Amber
Succinicum (C10H16O)
mineral
Red Amber (Burmite/Cherry Amber)
Succinite / Retinite (Organic Fossilized Resin, C10H16O)
Mineraloid (Organic)
Amber
Succinite (with empirical formula approximately C10H16O)
Organic Mineraloid
Amber
Succinite (C10H16O)
gemstone
Amber
Succinite (C10H16O)
mineral
Popcorn
Zea mays everta (P. Wilson) (Botanical name for the corn variety)
Organic/Biogenic
River Rock
Sedimentary Rock (various compositions)
sedimentary
Unknown Organic Object (likely a berry or fruit)
Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.
Organic Material (likely a fruit or berry)
Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)
Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)
mineral (synthetic)
Corundum (Sapphire/Ruby in Matrix)
Corundum (Al2O3)
mineral
Diamond
Diamond (pure native carbon, C)
mineral
Granite
Granite (a phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)
igneous
Granite
Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).
igneous
United States Quarter Dollar
Cupronickel Clad Alloy (75% Copper, 25% Nickel over a 100% Copper core)
Metal / Man-made mineral-like object
Mother of Pearl (Nacre)
Nacre (Aragonite/Conchiolin), CaCO3 + Organic Polymers
mineral
Polished amber
Amber (fossilized plant resin; chiefly polymerized diterpenoid resin)
gemstone
Amber
Succinite (organic gemstone, approx. C10H16O)
fossil
Amber
Succiniferous organic material (Succinite)
fossil
Amber
Fossilized tree resin
gemstone
Amber
Succinite (formula varies, primarily C10H16O)
Mineraloid (Organic)
Amber
Succinite (fossilized resin)
Organic Mineraloid
Amber
Fossilized Tree Resin (C10H16O)
mineral
Diamond (as featured in jewelry)
Diamond (C - pure carbon)
mineral
Amber (Copal)
Succinate (Fossilized Tree Resin)
mineraloid
Amber
Succinates (Organic Fossilized Resin)
mineral
Amber with inclusion
Amber (Fossilized Tree Resin)
mineral
Amber
Succinite (specifically for Baltic Amber), Formula: C10H16O
Organic Gemstone (often associated with Sedimentary sequences)
Amber
Succinite (specific to Baltic amber), fossilized tree resin
mineraloid
Granite
Phaneritic Igneous Rock (composed mostly of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Serpentine
Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)
metamorphic
Tiger Shark Fossil Tooth
Galeocerdo cuvier (fossilized)
sedimentary
Chalcanthite (Likely Synthetic/Lab-Grown)
Hydrated copper(II) sulfate (CuSO4·5H2O)
mineral
Dark rounded pebble, likely basalt or slag
Probable fine-grained mafic rock; possibly basalt (plagioclase–pyroxene) or industrial iron/steel slag
igneous
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Manufactured Glass (Simulant)