Sea Glass
Amorphous silicon dioxide (glass)
Category
Browse mineral (man made aura treatment) specimens identified by the Rock Identifier community.
Sea Glass
Amorphous silicon dioxide (glass)
Granite
Intrusive Felsic Igneous Rock (primarily Quartz and Feldspar)
Sandstone
Arenite
Blue glass-like tumbled specimen
Most likely cobalt-blue slag glass or manufactured glass; not confidently identifiable as a natural mineral from the image
Sunstone (Aventurine Feldspar)
(Ca,Na)((Al,Si)2Si2O8) with inclusions of Cu or Fe2O3
Diamond
Diamond (pure Carbon, C)
Diamond
Carbon (C)
Rough Diamond
Pure Carbon (C)
Sunstone
(Ca,Na)((Al,Si)2Si2O8) - Plagioclase Feldspar
Pearl
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
Red Sandstone
Arenite (Fe2O3 enriched)
Sandstone
Arenite
Sandstone
Arenite
Red Sandstone
Arenite (with Iron Oxide / Hematite staining)
Moonstone (specifically Rainbow Moonstone / White Labradorite)
White Labradorite (Feldspar Group: (Na,Ca)(Al,Si)4O8)
Sandstone
Arenite
Blue Chalcedony
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Orange chromium diopside (likely tumbled)
Diopside, CaMgSi₂O₆; orange color may reflect iron-rich composition or surface treatment/inclusion
Sandstone
Arenite
Sandstone
Arenite (mostly SiO2)
Sandstone
Arenite (primarily SiO2)
Graphite
Graphite (Carbon, C)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Diamond (Cluster Ring)
Carbon (C)
Flower Agate
Chalcedony (SiO2) with inclusions
Onyx (Black) and Mother of Pearl Inlay
Silicon Dioxide (SiO2) for Onyx; Aragonite (CaCO3) for Mother of Pearl
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
Red Sandstone
Arenite (Iron-rich)
Chert (with Limestone matrix)
Silicon dioxide (SiO2)
Chert (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
Sandstone (with potential Arkose/Lithic characteristics)
Arenite (Sedimentary rock composed of sand-sized grains)
Sandstone (specifically Arkose or Quartz Arenite)
Arenite (primarily SiO2 with possible Feldspar)
Granodiorite
Intrusive Igneous Rock
Amethyst
Amethyst (Silicon Dioxide - SiO2 with Iron impurities)
Sandstone (Pebble)
Sandstone (SiO2 with matrix/cement)
Sandstone
Arenite (specifically sublithic or quartz arenite)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Tumbled epidote-bearing rock (likely epidote–quartz–feldspar aggregate)
Epidote-rich metamorphic rock; minerals likely epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH), quartz, feldspar, and dark amphibole/biotite)
Pink Granite
Phaneritic Felsic Igneous Rock (composed of orthoclase, quartz, and plagioclase)
Sandstone
Arenite (composed primarily of SiO2)
Granite / Diorite (Granodiorite)
Granodiorite / Quartz Diorite
Nephrite Jade
Nephrite