Amethyst Quartz
SiO2 (Silicon Dioxide)
Category
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
Amethyst Quartz
SiO2 (Silicon Dioxide)
Pyrite
Iron Sulfide (FeS2)
Black Tourmaline (Schorl)
NaFe3Al6(BO3)3Si6O18(OH)4
Chert
Microcrystalline Quartz (SiO2)
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4
Red Jasper
SiO2 (Silicon Dioxide with Iron inclusions)
Amethyst (Pale/Lavender variety)
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO₂)
Cloudy Quartz (or Milky Quartz)
Silicon Dioxide (SiO2)
Botryoidal Chalcedony
Chalcedony (SiO2)
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
Jasper
Silicon Dioxide (SiO2)
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
Peridot (Olivine)
Olivine, (Mg,Fe)2SiO4
Quartz (Rose or Milky variety fragment)
Silicon Dioxide (SiO2)
Garnet Schist
Garnet-bearing Mica Schist (variety of compositions, often Al2SiO5 with X3Y2(SiO4)3)
Rose Quartz
Silicon Dioxide (SiO2) with trace impurities of Titanium, Manganese, or Iron
Chert (Flint variety)
Chert (Cryptocrystalline Quartz, SiO2)
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
Citrine Quartz
Citrine (Silicon Dioxide - SiO2)
Blue Quartzite
Quartzite (specifically a variety enriched with blue-coloring minerals)
Chert (White-Tan variety)
Silicon dioxide (SiO2) / Microcrystalline Quartz
Chert (Nodular Chert)
Microcrystalline Silica (SiO2)
Green Aventurine (likely)
Silicon dioxide (SiO2) with fuchsitemica inclusions
Banded Agate (Onyx type)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Seraphinite
Clinochlore (Mg,Fe)5Al(AlSi3O10)(OH)8 - specific variety for Seraphinite due to its fibrous inclusions and chatoyancy.
Blue Chalcedony
Silicon Dioxide (SiO2)
Quartz
Quartz (SiO₂)
Aventurine
Quartz (Aventurine variety)
Rutilated Quartz
SiO2 with TiO2 inclusions
Quartz (Float/Abraded)
Quartz (SiO₂)
Pink Thulite (in Pumice-like texture)
Pink Zoisite (Mn-bearing Zoisite), Ca2Al3(SiO4)3(OH)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Blue Diamond
Carbon (C) with trace Boron
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz (likely) or a Quartzite Pebble
Silicon dioxide (SiO2) for quartz. If it's quartzite, it's a metamorphic rock primarily composed of quartz.
Quartz (possibly milky quartz or quartz with inclusions)
SiO2 (Silicon Dioxide)