Cream Marble (Speckled)
Metamorphosed Limestone (mainly CaCO3)
metamorphic
Category
Mineral (Silicate Variety)
Browse mineral (silicate variety) specimens identified by the Rock Identifier community.
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Rose Quartz and Pegmatite
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Green Kyanite
Kyanite (Al2SiO5)
mineral
Sandstone (Fluvial Pebble)
Arenite
sedimentary
Iron-rich weathered pebble
Likely limonite/goethite-bearing ferruginous rock; exact identification requires testing
mineral
Tumbled brown jasper (likely brecciated jasper)
Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions
mineral
Emerald in Matrix (Quartz/Schist)
Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities
mineral
Shale
Lutaceous Rock (Hydrous Aluminum Silicates)
sedimentary
Quartz Pebble with Chlorite or Epidote Inclusions
Silicon Dioxide (SiO2) with inclusions
metamorphic
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
sedimentary
Weathered, iron-stained rock fragment
Unidentified iron-oxide-stained silicate rock; precise identification is not possible from the image
sedimentary
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Olivine
Magnesium Iron Silicate ((Mg, Fe)₂SiO₄)
mineral
Polished brecciated jasper (likely)
Microcrystalline quartz, SiO₂, with iron-oxide-rich brown fragments and pale silica
mineral
Ruby in Zoisite (Anyolite)
Anyolite (Combination of Corundum and Zoisite)
metamorphic
Petrified Wood / Fossilized Bone
Silicified / Mineralized Fossil (Silica SiO2)
fossil
Kyanite (within Quartz)
Kyanite (Al2SiO5) in crystalline Quartz base (SiO2)
metamorphic
Sodalite in Feldspar (or Sodalite Syenite / Yooperite-type rock)
Na8(Al6Si6O24)Cl2 (Sodalite) with KAlSi3O8 (Feldspar)
mineral
Banded Gneiss
Gneiss (complex metamorphic silicate rock)
metamorphic
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)
Weathered granite or granitic gneiss cobble
Quartz–feldspar–mica granitoid; exact identification requires a fresh surface or testing
igneous
Iron-rich meteorite (probable stony-iron or weathered iron meteorite)
Unclassified meteorite; likely Fe–Ni metal with silicate minerals
meteorite
Green sea glass (likely)
Anthropogenic glass, not a mineral; composition commonly soda–lime silicate glass
mineral
Tiger's Eye (Multicolor/Variegated)
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxides)
mineral
Veined Quartz
SiO2 (Silicon Dioxide)
Mineral
Small reddish-brown pebble, possibly jasper or iron-stained quartz
Unidentified silica-rich pebble; visual identification is insufficient to distinguish jasper, quartz, or another material
mineral
Quartz-veined Basalt or Limestone Pebble
Quartz vein in host rock (Silicate mineral in carbonate or volcanic matrix)
sedimentary
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Peridot (Olivine)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Quartz with Mica
SiO2 (Quartz) with Potassium aluminum silicate (Muscovite)
Mineral
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Moonstone
Potassium aluminum silicate (KAlSi3O8) with Albite (NaAlSi3O8)
mineral
Olivine (Peridot)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
mineral
Olivine
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Olivine (Peridot)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Olivine (Peridot when gem-quality)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Peridot (Olivine)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral