Serpentinite
Serpentinite (composed primarily of minerals in the Serpentine group)
Category
Browse man made glass (often grouped with minerals in lapidary) specimens identified by the Rock Identifier community.
Serpentinite
Serpentinite (composed primarily of minerals in the Serpentine group)
Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)
Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Jasper Pebble
Microcrystalline Quartz (SiO2)
Chert (varietal: Flint/Jasper)
Silicon Dioxide (SiO2)
Fossiliferous Limestone with Crinoid Stem
Sedimentary Rock with Crinoidea Fossil
Quartz Pebble
Silicon Dioxide (SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Quartz pebble
Silicon dioxide (SiO2)
Sea Glass
Amorphous Silica (Glass) SiO2
Sea Glass
Amorphous Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Sandstone
Sandstone (composed predominantly of Quartz, SiO2, with Feldspar and Clay minerals)
Quartzite
Metamorphic Quartzite (SiO2)
Quartzite
Metamorphic Quartzite (SiO2)
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
Quartzite
Metamorphic Quartz Rock (SiO2)
Quartz (Rose Quartz or Jasper variety)
Silicon Dioxide (SiO2)
Orange Quartz
Silicon Dioxide (SiO2)
Sandstone
Sedimentary Rock (Quartz Sandstone)
Jasper
SiO2 (Cryptocrystalline quartz)
Chert
Silicon dioxide (SiO2)
Blue calcite sphere
Calcite (CaCO₃), commonly blue-calcite variety
Obsidian
Volcanic glass
Chert (Yellow Jasper/Flint)
Silicon Dioxide (SiO2)
Polished serpentine
Serpentinite; chiefly antigorite, lizardite, or chrysotile-group minerals
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2
Garnet (specifically Almandine)
Almandine (Fe3Al2(SiO4)3)
Red cabochon gemstone ring (likely glass or synthetic stone)
Undetermined; the image does not establish a natural mineral identity
Iron-stained Quartz
Silicon Dioxide with Iron Oxide (SiO2 with Limonite/Hematite impurities)
Likely serpentine
Serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile; approximate formula Mg₃Si₂O₅(OH)₄
Quartzite
Metamorphic Quartzite (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Cuprite
Cuprite (Copper(I) oxide, Cu2O)
Feldspar (Plagioclase / Potassium Feldspar)
Feldspar Group (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
Quartzite
Quartzite (Metamorphosed Sandstone)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Chert (and Flint)
Silicon Dioxide (SiO2)
Quartz with Tourmaline inclusions
Silicon Dioxide (SiO2) with Tourmaline needles
Quartz Pebble
Silicon Dioxide (SiO2)