Agate
Silicon Dioxide (SiO2)
Category
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
Agate
Silicon Dioxide (SiO2)
Quartz (possibly milky quartz or quartz with inclusions)
SiO2 (Silicon Dioxide)
Amber
Organic gemstone (Succinite)
Amber
Succinates (Organic Gemstone)
Milky Quartz
Silicon Dioxide (SiO2)
Chert (Jasper)
Microcrystalline Quartz (SiO2)
Chert (Flint variety)
Chert (Cryptocrystalline Quartz, SiO2)
Polished orbicular jasper (likely ocean jasper)
Jasper, a microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions
Carnelian (red chalcedony), possibly red agate or jasper
Chalcedony, a microcrystalline variety of quartz; silicon dioxide (SiO₂), commonly colored red-orange by iron oxides. The specimen may include opaque jasper or agate zones.
Hypersthene
Hypersthene ((Mg,Fe)SiO₃)
Fuchsite (Chrome Mica)
K(Al,Cr)2(AlSi3O10)(OH)2
Yellow Quartz
Silicon Dioxide (SiO2)
Raw Citrine Quartz
Silicon Dioxide (SiO2)
Amazonite
Microcline feldspar (KAlSi3O8)
Citrine
SiO2 (Silicon Dioxide)
Chert
Microcrystalline Quartz (SiO2)
Chert
Chert (Microcrystalline Quartz, SiO2)
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4
Chert (often called Flint)
Microcrystalline Quartz (SiO2)
Amazonite
K(AlSi3O8) - Potassium Aluminum Silicate (Microcline)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO₂)
Green Aventurine (likely)
Silicon dioxide (SiO2) with fuchsitemica inclusions
Citrine
Silicon Dioxide (SiO2)
Citrine
Silicon Dioxide (SiO2) with iron impurities
Tumbled Citrine
Silicon Dioxide (Quartz variety)
Sardonyx or Carnelian Agate
Silicon Dioxide (SiO2) with iron impurities
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
Larimar
Pectolite (NaCa2Si3O8(OH))
Agate
SiO2
Pyrite
Iron Sulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2)
Quartz (Quartzite Pebble)
Silicon Dioxide (SiO2)
Seraphinite
Clinochlore (Mg,Fe)5Al(AlSi3O10)(OH)8 - specific variety for Seraphinite due to its fibrous inclusions and chatoyancy.
Citrine Quartz
Citrine (Silicon Dioxide - SiO2)
Yellow Agate
Silicon Dioxide (SiO2)
Pearl
Pearl; primarily aragonite (CaCO₃) in nacre