Diamond
Carbon (C)
mineral
Category
Mineral (Man Made Composite)
Browse mineral (man made composite) specimens identified by the Rock Identifier community.
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Diamond (in a jewelry setting)
Cubic Carbon (C)
mineral
Flint (chert)
Microcrystalline quartz (SiO₂), commonly called chert or flint
sedimentary
Pink Zebra Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Likely clear quartz crystal (possibly cut/polished quartz or glass imitation)
Quartz, silicon dioxide (SiO₂)
mineral
Polished smoky quartz crystal point
Quartz (SiO₂), likely iron-colored or smoky quartz with milky inclusions
mineral
Basalt
Basalt
igneous
Clear-stone silver-tone teardrop earring
The stones may be colorless quartz or glass; the image does not allow reliable identification. Metal setting appears silver-tone.
gemstone
Diamond
Carbon (C)
gemstone
Granite
Granite (phaneritic intrusive igneous rock consisting of quartz, feldspar, and mica)
igneous
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Mica Schist
Mica Schist (principally Biotite/Muscovite, Quartz, and Feldspar)
metamorphic
Dark quartz point (possibly smoky quartz)
Quartz, SiO₂; the dark color may indicate smoky quartz, but the image is insufficient to confirm
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Moonstone (specifically Rainbow Moonstone / White Labradorite)
White Labradorite (Feldspar Group: (Na,Ca)(Al,Si)4O8)
mineral
Pumice or vesicular volcanic tuff
Pumice: highly vesicular volcanic glass, chiefly rhyolitic to dacitic; possible tuff: lithified ash and pumice fragments
igneous
Siltstone Pebble
Siltstone (composed of microscopic quartz and clay minerals)
sedimentary
Small metallic-looking mineral/rock fragment
Indeterminate from image; possibly galena, hematite, or metallic slag
mineral
Small dark rock fragment
Uncertain; possibly weathered basalt or slag
mineral
Granodiorite
Intrusive Igneous Rock
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Precious Coral (Red Coral)
Corallium rubrum (Calcium Carbonate, CaCO3)
mineral
Sandstone
Arenite (SiO2 composition dominant)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Native American Pottery Sherd
artifact
Tourmalinated quartz point
Quartz (SiO₂) with black tourmaline (schorl, NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) inclusions
mineral
Jasper (Iron-rich Chalcedony)
Jasper (Microcrystalline Silicon Dioxide, SiO2 plus iron oxide impurities)
Sedimentary / Metamorphic
Chert (likely flint)
Microcrystalline quartz, SiO₂
sedimentary
Small metallic-gold mineral fragment, possibly pyrite
Pyrite (FeS₂), if confirmed
mineral
Granite
Felsic intrusive igneous rock
igneous
Goldstone (likely blue-free synthetic goldstone pendant)
Synthetic aventurine glass; silica glass with dispersed metallic copper crystals
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Yellow chalcedony (likely lemon agate or yellow jasper)
Microcrystalline quartz, SiO₂; possibly iron-bearing jasper or chrysoprase-like chalcedony
mineral
Tumbled chalcedony or quartz pebble
Microcrystalline quartz (SiO₂), likely orange chalcedony/carnelian
mineral
Diamond (Cluster Ring)
Carbon (C)
mineral
Flower Agate
Chalcedony (SiO2) with inclusions
mineral
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
mineral
Granite / Diorite (Granodiorite)
Granodiorite / Quartz Diorite
igneous
Sandstone
Sedimentary Clastic Rock (Quartzose Sandstone)
sedimentary
Probable amber fragment
Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)
gemstone
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (SiO2 with Fe2O3 inclusions)
sedimentary