Pearl (Biogenic Mineraloid)
Calcium carbonate (Aragonite) and Conchiolin, CaCO3
mineral
Category
Mineral With Artificial Coating
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Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Amazonite
Tectosilicate (variety of Microcline), K(AlSi3O8)
mineral
Fluorite
Calcium fluoride (CaF2)
mineral
Pearl
Calcium Carbonate (Aragonite and Calcite), CaCO3
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Gold Flakes
Native Gold (Au)
mineral
Pink and Green Tourmaline (Tumbled)
Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Costume Jewelry Gemstones (Emerald-imitation and semi-precious beads)
BeCuAl6Si6O18 (Beryl structure), frequently simulated by glass or synthetic spinel
mineral
Chrysocolla
Chrysocolla: Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O
mineral
Morganite (Pink Beryl)
Beryllium aluminum silicate Be3Al2(SiO3)6
mineral
Plume Agate or Moss Agate
Silicon dioxide (SiO2)
Mineral
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
mineral
Amethyst (Chevron or Banded Amethyst)
Silicon Dioxide (SiO2) with trace Iron (Fe)
mineral
Limonite (Ochreous)
FeO(OH)·nH2O (Hydrated Iron Oxide)
mineral
Celestite (Celestine) Geode
Strontium Sulfate (SrSO4)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Celestine (or Celestite)
Strontium sulfate (SrSO4)
mineral
Chalcedony (Botryoidal/Chalcedony Rose)
Silicon Dioxide (SiO2)
mineral
Silver (Jewelry Specimen)
Native Silver (Chemical Formula: Ag)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Rutilated)
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Smoky Quartz
Silicon Dioxide (SiO2) with trace aluminum and irradiation
mineral
Chrysocolla and Malachite Beads
Hydrated copper silicates (Chrysocolla) and Copper carbonate hydroxide (Malachite)
mineral
Herkimer Diamond
Quartz (Silicon Dioxide) - SiO2
mineral
Chalcopyrite in Gossan
Chalcopyrite (CuFeS2) in a Limonite-rich Gossan matrix
mineral
Tanzanite
Blue Zoisite (Ca2Al3(SiO4)3(OH))
gemstone
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Amethyst
Quartz (Silicon Dioxide with Iron impurities), SiO2
mineral
Labradorite
(Ca,Na)(Al,Si)4O8 (Sodic-calcic plagioclase feldspar)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Quartz (Golden Quartz / Citrine / Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz with Muscovite Mica
SiO2 with KAl2(AlSi3O10)(OH)2
mineral group
Granite
Granite (Phaneritic Igneous Rock)
igneous
Basalt and Quartz Pebble
Basalt (Igneous) and Quartzite/Quartz (SiO2) pebble
igneous and sedimentary
Fluorite on Matrix
Calcium Fluoride (CaF2)
mineral
Pink Granite
Phaneritic Plutonic Rock (Felsic)
igneous
Quartz on Feldspar
Silicon Dioxide (SiO2) with Potassium Feldspar (KAlSi3O8)
igneous
Schist (Garnet-Mica Schist)
Garnet-Mica Schist
metamorphic