Smoky Quartz
Smoky Quartz (SiO2)
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
Sandstone
Arenite (SiO2 based)
sedimentary
Diamond
Carbon (C)
gemstone
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Sandstone
Arenite (SiO2 based clastic rock)
sedimentary
Sandstone
Arenite
sedimentary
Jasper (Iron-rich Chalcedony)
Jasper (Microcrystalline Silicon Dioxide, SiO2 plus iron oxide impurities)
Sedimentary / Metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Tektite
Natural impact glass
meteorite
Sandstone
Arenite (SiO2 primarily)
sedimentary
Chert
Silicon dioxide (SiO2)
Sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Moonstone (specifically Rainbow Moonstone / White Labradorite)
White Labradorite (Feldspar Group: (Na,Ca)(Al,Si)4O8)
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Botryoidal chalcedony with iron-oxide staining
Microcrystalline quartz (SiO₂), likely iron-oxide-bearing chalcedony
mineral
Granite
Granite (phaneritic intrusive igneous rock consisting of quartz, feldspar, and mica)
igneous
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Precious Coral (Red Coral)
Corallium rubrum (Calcium Carbonate, CaCO3)
mineral
Granite
Intrusive Felsic Igneous Rock (primarily Quartz and Feldspar)
igneous
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO2)
mineral
Obsidian
Volcanic Glass (SiO2)
igneous
Granodiorite
Intrusive Igneous Rock
igneous
Sandstone
Arenite (SiO2 composition dominant)
sedimentary
Diamond
Carbon (C)
mineral
Small dark rock fragment
Uncertain; possibly weathered basalt or slag
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
Polished blue stone, likely sodalite or dyed agate
Sodalite: Na₈(Al₆Si₆O₂₄)Cl₂; exact identification requires testing
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sunstone (Aventurine Feldspar)
(Ca,Na)((Al,Si)2Si2O8) with inclusions of Cu or Fe2O3
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Rough Diamond
Pure Carbon (C)
mineral
Sunstone
(Ca,Na)((Al,Si)2Si2O8) - Plagioclase Feldspar
mineral
Pearl
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
mineral
Red Sandstone
Arenite (Fe2O3 enriched)
sedimentary
Granite / Diorite (Granodiorite)
Granodiorite / Quartz Diorite
igneous
Granite
Felsic intrusive igneous rock
igneous
Blue Chalcedony
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral