Lapis Lazuli
Lazurite-rich metamorphic rock (complex silicate)
metamorphic
Category
Mineral (Gemstone)
Browse mineral (gemstone) specimens identified by the Rock Identifier community.
Chert (Yellow/Tan)
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Tektite (specifically Indochinite)
Tektite (Natural silica glass)
Mineraloid (Impact glass)
Olivine Peridotite
Peridotite (comprising Olivine (Mg,Fe)2SiO4 and Pyroxene)
igneous
Obsidian
Obsidian (Amorphous Volcanic Glass, SiO2)
igneous
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Unakite
Epidotized Granite
metamorphic
Stichtite in Serpentine (Atlantisite)
Mg6Cr2CO3(OH)16·4H2O (Stichtite) within Mg3Si2O5(OH)4 (Serpentine)
metamorphic
Lapis Lazuli (blue bead) and Moss Agate (green heart)
Lapis Lazuli (lazurite-based rock) and Moss Agate (SiO2 with manganese/iron inclusions)
metamorphic (Lapis) and sedimentary/igneous assoc. (Moss Agate)
Unakite
Unakite (Epidotized Granite)
metamorphic
Amber
Succinates (Organic compound: C10H16O)
mineraloid
Labradorite (Larvikite variety)
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8 with Monzonite/Syenite matrix
igneous
Green Aventurine
Aventurine Quartz (SiO2) with Fuchsite inclusions
metamorphic
Jasper
Jasper (Silicified microcrystalline quartz) - SiO2
sedimentary
Tiger's Eye (Gold/Brown variety)
Silicon dioxide (SiO2) with fibrous crocidolite inclusions
metamorphic
Banded Chert (Agate-like Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Amber
Succinite
Organic Mineraloid
Chert (containing Flint nodules)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Obsidian
Obsidian (Volcanic Glass), primarily SiO2
igneous
Chert (Yellow or Brown Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Greenstone (Greywacke or Nephrite Jade variant)
Metamorphosed mafic igneous or sedimentary rock (e.g., Actinolite-Chlorite Schist)
metamorphic
Rough Agate/Chert Nodules
Cryptocrystalline Quartz (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide)
igneous
Pietersite
Brecciated Crocidolite in Quartz (Chalcedony)
metamorphic
Red Jasper
Jasper (Silicon Dioxide) - SiO2
sedimentary
Garnet (Red Garnet)
Garnet Group. The red varieties seen in jewelry are typically Almandine (Fe3Al2(SiO4)3), Pyrope (Mg3Al2(SiO4)3), or a mix of the two (pyrope-almandine series).
Mineral (specifically, a variety of the mineral species Pyrope-Almandine Garnet)
Amber
Succinite (specifically for Baltic amber); chemical formula approx. C10H16O
Organic Gemstone (fossilized resin)
Pyrite
Pyrite (Iron sulfide, FeS₂)
Mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (Goethite/Limonite)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
sedimentary
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial Byproduct)
mineraloid
Blue Goldstone
Aventurine Glass
Man-made glass (often grouped with minerals in lapidary)
Jasper
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Tiger's Eye (Golden and Blue Pietersite mix)
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
metamorphic
Rhyolite
Rhyolite (felsic volcanic rock)
igneous
Unakite
Unakite (Epidotized Granite)
metamorphic
Chert (specifically Flint or Jasper-Chert)
Silicon Dioxide (SiO2)
sedimentary