Chert (varieties: Flint or Jasper)
Silicon dioxide (SiO2) / Microcrystalline Quartz
sedimentary
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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Quartz Pebble (with Hematite Inclusions)
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Sea Glass (Uranium/Vaseline Glass variant)
Silicon Dioxide (SiO2) with trace Uranium Oxide (U3O8)
man-made silicate (anthropogenic glass)
N/A - Man-made object (Jewelry Chain)
Antiqued or Oxidized Metal Chain (often Steel or Brass)
Mineral (processed metal)
Quartz with Chlorite / Greenschist
Quartz vein in Greenschist (SiO2 with Chlorite group minerals)
metamorphic
Quartz (Variety: Agate / Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Chert (specifically Flint or Gray Chert)
Silicon Dioxide (Microcrystalline Quartz), SiO2
sedimentary
K-Feldspar (Microcline / Orthoclase)
Potassium Feldspar (KAlSi3O8)
mineral
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Rose Quartz
Silicon dioxide (SiO2)
mineral
Green Jasper / Chert Pebbles
Microcrystalline Quartz (SiO2)
sedimentary
Olivine (Peridotite)
Olivine Group; (Mg, Fe)2SiO4
igneous
Quartz pebble
Silicon dioxide (SiO2)
mineral
Galena
Lead Sulfide (PbS)
mineral
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Chert (Green Jasper)
Microcrystalline Quartz (SiO2) with iron silicate inclusions
sedimentary
Jasper River Stone
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Blue and White Quartz
Crystalline Silicon Dioxide with inclusions (SiO2)
mineral
Fossil Sea Urchin (Echinoid)
Echinoidea fossil (often replaced by silica or calcite)
fossil
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Epidote with Quartz and Feldspar
Ca2(Al2,Fe3+)(SiO4)3(OH) (Epidote complex)
metamorphic
Mahogany Obsidian
Volcanic glass (SiO2 with Hematite/Magnetite inclusions)
igneous
Greenstone / Serpentinite
Serpentine-group / Altered Mafic Rock
metamorphic
Metal Alloy (Jewelry)
Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.
Man-made Material (jewelry, metal alloy)
Jasper
Silicon dioxide (SiO2)
sedimentary
Goldstone and Aura Quartz
Cuprous Glass (Goldstone) and Titanium-coated SiO2 (Aura Quartz)
Mineral/Glass Specimen
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Greenstone / Serpentinite
Serpentinite (composed primarily of minerals from the serpentine group Mg3Si2O5(OH)4)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Schorl (Black Tourmaline)
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Tumbled green stone, likely serpentine
Serpentinite; principally serpentine-group minerals, Mg₃Si₂O₅(OH)₄
metamorphic
Sandstone Concretion
Sedimentary concretion
Sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz (Milky/Tan)
Silicon Dioxide (SiO2)
mineral
Diamond (Colorless/White)
Carbon (C)
mineral
Clear Quartz Cluster
Silicon Dioxide (SiO2)
mineral
Chert (often called Jasper or Flint)
Microcrystalline Silica (SiO2)
sedimentary
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, e.g., Antigorite, Lizardite, Chrysotile)
metamorphic