Chert / Flint
Cryptocrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
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Travertine
Travertine (CaCO3 - Calcium Carbonate)
sedimentary
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Blue Slag Glass
Ferro-silicate glass (Slag)
igneous (man-made/industrial)
Cubic Zirconia and Synthetic Ruby Jewelry
Cubic Zirconia (ZrO2) and Synthetic Corundum (Al2O3)
gemstone
Quartz Vein (Iron-stained)
Silicon Dioxide (SiO2) with limonite/hematite staining
mineral
Red Jasper
Red Jasper (SiO2 with Hematite inclusions)
sedimentary
Greenstone
Metabasalt / Chlorite Schist
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Milky Quartz Vein with Iron Staining
Silicon Dioxide (SiO2)
mineral
Dalmatian Jasper
Peralkaline Feldspar Diorite/Rhyolite
igneous
Gold-Bearing Quartz Ore
Crystalline Silicon Dioxide (SiO2) with Trace Aurum (Au)
mineral
Blue Goldstone
Aventurine Glass (Silicon Dioxide with metal inclusions)
man-made glass mineral simulant
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Gemstone Sand (Mineral Assortment)
Mixed Mineral Concentrates (Commonly including Quartz SiO2, Garnet X3Y2(SiO4)3, and Tourmaline (Na,Ca)(Li,Mg,Al)3(Al,Fe,Mn)6(BO3)3(Si6O18)(OH,F)4)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Limestone (Brecciated/Recrystallized)
Calcium Carbonate (CaCO3)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Gold Grain
Native Gold (Au)
mineral
Green Tourmaline (Verdelite)
Schorl-Elbaite series (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace impurities of Ti, Mn, or Fe
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Dyed Agate
Agate (Silicon Dioxide, SiO2)
Mineral
Aquamarine
Beryl (Be3Al2Si6O18 with Fe2+ trace elements)
Mineral
Goldstone (Brown)
Aventurine glass
mineraloid (man-made)
Slate
Slate (Metamorphic Rock)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Baltic Amber (Butterscotch or Egg Yolk Variety)
Succinite (C10H16O)
Organic Gemstone (Mineraloid)
Sandstone (likely a river or beach pebble)
Sandstone (a clastic sedimentary rock)
Sedimentary Rock
Snowflake Obsidian (Polished Cabochon)
Obsidian with Spherulitic Cristobalite (SiO2)
igneous
Pebble (likely Sandstone or Granitic Pebble)
Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)
Rock (likely Sedimentary)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in Altered Host Rock
mineral
Opalite
Man-made Glass (Synthetic Opalized Glass)
mineral
Quartzite
Quartzite (primarily composed of SiO O₂)
Sedimentary Rock
Quartz (Citrine variety)
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
mineral
Blue Quartzite
Metamorphosed Quartz (SiO2) with inclusions
metamorphic
River Pebble (Greywacke or Basaltic)
Massive Greywacke or Basaltic Andesite
sedimentary or igneous
River Stone (likely Basalt or Chert)
Silicon Dioxide (SiO2) for chert or Mafic Extrusive Rock for basalt
igneous/sedimentary