Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3
mineral
Category
Organic Gem Material (Botanical)
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Amethyst Quartz Druse
Silicon Dioxide (SiO2) with iron impurities
mineral
Emerald
Beryl (Be3Al2Si6O18) with trace amounts of Chromium and/or Vanadium
mineral
Amethyst Quartz (Amethyst Geode)
Silicon Dioxide (SiO2) with iron impurities
mineral
Moonstone
Orthoclase (Potassium Aluminum Silicate), Formula: (K,Na)AlSi3O8
mineral
Amethyst (Quartz)
Amethyst (SiO2 with iron impurities)
mineral
Amber
(C10H16O)n – an amorphous organic substance, primarily composed of polymerized isoprenoids.
Mineral
Black Limestone with Calcite Veining
Bituminous Limestone (CaCO3 with Organic Carbon inclusions)
sedimentary
Celestite (Celestine)
Strontium Sulfate (SrSO4)
mineral
Citrine
Silicon dioxide (SiO2)
mineral
Heat-Treated Citrine
Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Green Quartz (Prasiolite)
Crystalline Silicon Dioxide (SiO2)
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Garnet
Garnet (X3Y2(SiO4)3)
mineral
Amethyst (Rose de France varieties or Amethystine Quartz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Silicon Dioxide (SiO2) with trivalent iron (Fe3+) impurities
mineral
Aquamarine on Feldspar Matrix
Beryl (Be3Al2Si6O18) with Potassium Feldspar (KAlSi3O8)
mineral
Chalcopyrite
Chalcopyrite (CuFeS2)
mineral
Citrine
SiO2 (Silicon Dioxide)
mineral
Emerald in Matrix
Emerald (variety of Beryl) - Be3Al2(SiO3)6
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Blue Sapphire
Corundum (Al2O3) with traces of Iron and Titanium
mineral
Granitic Pegmatite
Pegmatite (composed primarily of Quartz, Feldspar, and Muscovite mica)
igneous
Carnelian
Carnelian Chalcedony (SiO2 with iron oxide impurities)
mineral
Amethyst
Silicon Dioxide (SiO2) with Iron impurities
mineral
Amethyst (Tumbled)
Amethyst (Silicon Dioxide with Iron impurities), SiO2
mineral
Raw Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Ruby in Zoisite (Anyolite)
Anyolite (Combination of Corundum and Zoisite)
metamorphic
Amethyst (Faceted)
Silicon Dioxide with Iron impurities (SiO2)
mineral
Chert / Flint
Chert (varieties include Flint)
Sedimentary
Pearl
Calcium carbonate (CaCO3) as Aragonite or Calcite
mineral
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
mineral
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Smoky Quartz
SiO2 (Silicon Dioxide)
mineral
Banded Agate (specifically Lake Superior Agate type)
Silicon Dioxide (SiO2) - variety Chalcedony
mineral