Blue Quartz with Dumortierite/Magnesio-riebeckite inclusions
Quartz (SiO2) containing Dumortierite (Al7(BO3)(SiO4)3O3)
igneous/metamorphic
Category
Man Made Glass (Often Grouped With Minerals In Lapidary)
Browse man made glass (often grouped with minerals in lapidary) specimens identified by the Rock Identifier community.
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Brown Jasper
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Blue Apatite
Apatite (Group), Ca5(PO4)3(F,Cl,OH)
mineral
Chert (Green Chert/Jasper)
Chert (primarily Microcrystalline Quartz, SiO2)
sedimentary
Greenstone with Epidote or Quartz veins
Metabasalt (Greenstone facies)
metamorphic
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Industrial Slag
Anthropogenic Vitreous Slag
igneous
Chert / Yellow Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Ferrous Slag (Iron Smelting By-product)
Fused Siliceous Slag
Anthropogenic Material (Man-made Rock)
Graphite
Graphite (Carbon, C)
mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Banded Quartzite with Epidote and Iron Oxides
Metasedimentary Quartzite (SiO2) with inclusions
metamorphic
Serpentinite
Serpentinite (composed primarily of mineral group (Mg,Fe,Ni,Al)3Si2O5(OH)4)
metamorphic
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (and Jasper/Chalcedony mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Red Sandstone
Arenite (primarily SiO2 with Fe2O3)
sedimentary
Jasper with Iron Staining
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
US Penny
Cuprum (Copper: Cu) and Zincum (Zinc: Zn) Alloy
Man-made object (metal alloy)
Quartz-rich rock, possibly milky quartz or quartzite
Quartz (SiO₂), potentially quartzite if the grains are fused
mineral
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
man-made (synthetic rock)
Chert (Brecciated or Veined)
Silicon Dioxide (SiO2)
sedimentary
Quartz (Agate/Jasper pebble)
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Obsidian
Obsidian (Volcanic Glass)
igneous
Chert (Brown Variety)
Microcrystalline Quartz (SiO2)
sedimentary
Iron-stained Quartz Pebble
Silicon Dioxide (SiO2) with Hematite/Limonite inclusions
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Chert (often called Jasper in this color variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (and/or Flint)
Chert (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Ferruginous Quartz
Silicon Dioxide with Hematite/Limonite inclusions (SiO2 + Fe2O3)
mineral
Chert (Jasper / Quartz pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Blue-beaded gemstone jewelry, likely lapis lazuli or dyed blue agate
Uncertain from the image; possible lazurite-bearing lapis lazuli (Na₃Ca(Si₃Al₃)O₁₂S) or blue chalcedony (SiO₂)
gemstone
Agate
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral