Opalite
Synthetic Opalized Glass
mineraloid (man-made)
Category
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Moss Agate
Silicon Dioxide (SiO2) with mineral inclusions of hornblende or chlorite
Mineral (variety of Chalcedony)
Obsidian
Obsidian (Amorphous volcanic glass)
igneous
Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2)
mineral
Blue Sodalite (Tumbled)
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Lapis Lazuli
Lazurite-rich metamorphic rock (approx. (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Garnet in Matrix (likely Almandine in Quartz/Mica Schist)
Almandine Garnet (Fe3Al2(SiO4)3) in Quartz-Feldspar host rock
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Larvikite
Larvikite (Anorthoclase-rich Monzonite)
igneous
Amethyst
Amethyst (Silicon Dioxide with iron impurities), SiO2
mineral
Raw Emerald
Beryl (Be3Al2(SiO3)6) with Cr/V impurities
mineral
Amethyst
Silicon dioxide (variant with ferric iron impurities), SiO2
mineral
Amethyst
Silicon Dioxide with iron impurities (SiO2)
mineral
Jasper (Imperial Jasper style)
Silicon Dioxide (SiO2) with impurities
sedimentary
Tree Agate (Dendritic Agate/Quartz)
Silicon Dioxide (SiO2) with trace Manganese or Iron oxide inclusions
mineral
Amethyst Geode
Amethyst (Silicon Dioxide, SiO2)
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2 + impurities)
mineral
Andesite
Andesite (Intermediate Volcanic Rock)
igneous
Chalcedony (Common Opal or Agate variant)
Silicon Dioxide (SiO₂)
mineral
Amethyst
Silicon dioxide (SiO2) with iron impurities
mineral
Limonite
Limonite (Hydrated iron(III) oxide-hydroxide) FeO(OH)·nH2O
mineral
Amazonite
Potassium Feldspar (Microcline) - K(AlSi3O8)
mineral
Banded Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Green Moss Agate
Silicon Dioxide with inclusions (SiO2)
sedimentary
Moonstone
Orthoclase/Albite (KAlSi3O8 / NaAlSi3O8) with Adularescence
mineral
Amethyst (Faceted)
Amethyst (Silicon Dioxide with iron impurities, SiO2)
mineral
Caribbean Calcite
Calcium Carbonate with Argonite (CaCO3)
mineral
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions
mineral
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
White Agate (Chalcedony)
Agate (Silicon Dioxide - SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Yellow Jasper
Silicon Dioxide with Limonite (SiO2 + FeO(OH)·nH2O)
sedimentary
Amethyst
Amethyst (Silicon Dioxide containing trace Iron impurities, SiO2)
mineral
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Lapis Lazuli
Lapis Lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic