Amethyst (Tumbled)
Silicon Dioxide (SiO2) with iron impurities
mineral
Category
Mineral (Biogenic)
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Gold Ore in Quartz/Schist
Auriferous Quartz and Sulfide-bearing Schist
Metamorphic/Igneous (Hydrothermal)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
metamorphic
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Dalmatian Stone (Dalmatian Jasper)
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Sunstone
Feldspar (variety Oligoclase or Labradorite), (Ca,Na)(Al,Si)4O8
mineral
Ocean Jasper
Orbicular Jasper (variety of Chalcedony/Quartz, SiO2)
sedimentary
Pyrite Concretion (Grapestone)
Iron Sulfide (FeS2) Concretion
sedimentary
Nuummite
Antigorite-Anthophyllite complex
metamorphic
Botryoidal Chalcedony in Geode/Vug
Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Quartz (Silicon Dioxide with Iron impurities), SiO2
mineral
Amethyst (Quartz)
Silicon Dioxide (SiO2) with Iron impurities
mineral
Amazonite
Tectosilicate (variety of Microcline), K(AlSi3O8)
mineral
Ruby in Kyanite
Corundum (Al2O3) in Kyanite (Al2SiO5)
metamorphic
Carnelian
Carnelian (SiO2)
mineral
Amethyst (Tumbled Quarz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Raw Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Ocean Jasper
Orbicular Jasper (Silicon Dioxide with impurities like Hematite and Chlorite, SiO2)
sedimentary
Moonstone with Black Tourmaline
Orthoclase (KAlSi3O8) with Schorl inclusions
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst (Chevron or Banded Amethyst)
Silicon Dioxide (SiO2) with trace Iron (Fe)
mineral
Nuummite
Antophyllite-Gedrite (Orthorhombic amphiboles)
metamorphic
Quartz (Citrine or Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Amethyst (Geode)
Silicon Dioxide (SiO2) with iron impurities
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Celestine (or Celestite)
Strontium sulfate (SrSO4)
mineral
Cinnabar
Mercury(II) sulfide (HgS)
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Amethyst (Rough Quartz)
Silicon Dioxide (SiO2 with Iron impurities)
mineral
Sunkissed Quartz or Hematoid Quartz
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
mineral
Quartz Geode
Silicon Dioxide (SiO2) in a Secondary Formation
sedimentary
Amethyst
Silicon Dioxide (SiO2)
mineral
Schorl (Black Tourmaline)
NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)
mineral
Amethyst Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Bornite
Bornite (Cu5FeS4)
mineral
Moonstone
Orthoclase (Potassium aluminum silicate - KAlSi3O8)
mineral
Emerald In Matrix (Quartz/Calcite)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral