Polished orbicular jasper
Jasper, a microcrystalline variety of quartz (SiO₂), colored by iron oxides and other accessory minerals
igneous
Category
Industrial Byproduct (Anthropogenic Material)
Browse industrial byproduct (anthropogenic material) specimens identified by the Rock Identifier community.
Learn about Industrial Byproduct (Anthropogenic Material) in the encyclopedia
View all →
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Rough Diamond
Carbon (C)
mineral
Blue topaz (likely treated)
Topaz, Al₂SiO₄(F,OH)₂
gemstone
Opalite
Man-made Opalized Glass (Synthetic Glass)
gemstone
Weathered iron-rich rock, possibly meteorite
Uncertain; likely goethite/hematite-rich material, with meteorite possibility
mineral
Red Sandstone
Arenite (Iron-rich Sandstone)
sedimentary
Diamond
Carbon (C)
gemstone
Anthracite Coal
Anthracite (Carbon C)
metamorphic
Diamond
Carbon (C)
gemstone
Chert (often called Flint or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Tumbled purple fluorite (probable)
Fluorite, calcium fluoride (CaF₂)
mineral
Tumbled pink-and-white quartz
Quartz, silicon dioxide (SiO₂), likely rose quartz mixed with milky quartz
mineral
Tumbled honey calcite (likely aragonite/calcite material)
Calcite, CaCO₃; possibly aragonite, a polymorph of CaCO₃
mineral
Pumice
Pumice (Vesicular Felsic Igneous Rock)
igneous
Likely rose quartz-bearing pegmatite
Quartz (SiO₂), probably with feldspar and iron-oxide staining
mineral
Mica Schist with Quartz
Mica Schist (KAl2(AlSi3O10)(OH)2 / SiO2)
metamorphic
Cubic Zirconia (CZ) Jewelry
Zirconium dioxide (ZrO2)
mineral (synthetic)
Schist
Mica Schist (predominantly Muscovite/Biotite)
metamorphic
Tumbled orbicular jasper
Orbicular jasper; microcrystalline quartz (SiO₂) with iron oxides and feldspathic/chalcedony inclusions
sedimentary
Small rounded pebble, likely quartz-rich stone
Indeterminate from photograph; possibly microcrystalline quartz (SiO₂) or a weathered silicate pebble
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Tumbled jasper or chalcedony pebble
Microcrystalline quartz (SiO₂), likely jasper/chalcedony with iron-oxide staining
mineral
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Polished Ocean Jasper (orbicular jasper)
Siliceous microcrystalline quartz/chalcedony, mainly SiO₂, with iron- and manganese-rich inclusions
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chalcedony (Agate/Carnelian variety)
Cryptocrystalline Quartz (SiO2)
mineral
Chert (often called Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Diamond
Carbon (C)
gemstone
Titanium Coated Aura Quartz (Apple Aura Quartz)
Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating
Mineral (Man-modified)
Diamond (set in Gold)
Diamond (pure carbon, C)
mineral
Chert with Druzy Quartz Geode
Microcrystalline Quartz (SiO2)
sedimentary
Likely black beach pebble
Undetermined; possibly basalt, chert, or dark slate
sedimentary
Chert (often called Flint)
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
River Pebble (Basalt)
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Honey-colored chalcedony (possibly yellow/orange agate or carnelian)
Chalcedony, a microcrystalline variety of quartz; SiO₂. The color may result from iron-oxide inclusions. Exact identification is uncertain from a photograph alone.
gemstone
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Chert / Flint
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
Mineral
Amazonite
Microcline feldspar (KAlSi₃O₈), green variety
mineral