Amethyst (Tumbled)
Silicon Dioxide (SiO2) with iron impurities
Category
Browse sedimentary rock (possibly conglomerate or breccia with a quartz vein) specimens identified by the Rock Identifier community.
Amethyst (Tumbled)
Silicon Dioxide (SiO2) with iron impurities
Citrine
Silicon dioxide (SiO2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Hematite
Hematite, Iron(III) oxide (Fe2O3)
Milky Quartz
Quartz (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Magnetite
Iron(II,III) oxide (Fe3O4)
Orpiment
Orpiment (As2S3)
Milky Quartz
Silicon Dioxide (SiO2)
Citrine Quartz
Crystalline Quartz (SiO2) with iron impurities
Green Quartz (Prasiolite/Adventurine)
Silicon Dioxide (SiO2) with inclusions
Pyrite
Iron Disulfide (FeS2)
White Quartz Sphere
Silicon Dioxide (SiO2)
Fluorite (Green)
Calcium Fluoride (CaF2)
Milky Quartz
Silicon Dioxide (SiO2)
Onyx Marble (also commonly called Onyx)
Calcite (CaCO3), often with other mineral impurities
Gold
Native Gold (Au)
Pyrite
Iron Sulfide (FeS2)
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Fluorite
Calcium Fluoride (CaF2)
Native Gold
Gold (Au)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Golden Healer Quartz
Silicon Dioxide (SiO2) with limonite/hematite inclusions
Fluorite
Calcium Fluoride (CaF2)
Milky Quartz
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Quartz (Milky or Cloudy Quartz)
Silicon Dioxide (SiO2)
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
Chevron Amethyst
Crystalline Silicon Dioxide with Iron impurities (SiO2)
Citrine
Citrine (Silicon Dioxide, SiO2)
Citrine
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Pyrite
Iron Disulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Quartz (Grain)
Silicon Dioxide (SiO2)
Celestine (or Celestite)
Strontium sulfate (SrSO4)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)