Lapis Lazuli
Lapis Lazuli (Mineral composition: Lazurite, Calcite, Sodalite, and Pyrite)
metamorphic
Category
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Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Schist
Mica Schist
metamorphic
Schist
Crystalline Metamorphic Rock (Schistose)
metamorphic
Agate
Silicon Dioxide (SiO2)
mineral
Blue Aventurine
Silicon Dioxide (SiO2) with inclusions of Dumortierite
Mineral (Variety of Quartz)
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
Mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Red Garnet
Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
mineral
Amethyst
SiO2 (Amethyst is a variety of Quartz)
mineral
Amethyst
Amethyst (Silicon Dioxide with Iron impurities), SiO₂
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Red Jasper
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
sedimentary
Greenstone (Epidote/Chlorite-rich Metabasalt)
Greenschist / Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Amethyst Quartz
Silicon Dioxide (SiO2 with iron impurities)
mineral
Tiger's Eye (Oeil de Tigre)
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Amethyst
SiO2 (Silicon Dioxide) - Purple variety of Quartz
mineral
Blue Opal in Matrix
Hydrated Silica (SiO2·nH2O)
mineral
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Carnelian
Carnelian (variety of Chalcedony, SiO2)
mineral
Tree Agate
Silicon Dioxide (SiO2) - Dendritic Agate/Chalcedony
sedimentary
Conch Pearl
Calcareous concretion (CaCO3)
mineraloid
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Banded Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Dalmatian Jasper
Dalmatian Stone (not a true Jasper, primarily a Perthitic Feldspar with Arfvedsonite)
igneous
Black Onyx
Silicon dioxide (SiO2) - Chalcedony variety
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Dyed Agate (Tumbled)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Fuchsite (Green Muscovite)
K(Al,Cr)2(AlSi3O10)(OH)2
Mineral
Dalmatian Stone
Peralkaline Feldsphathic Igneous Rock
igneous
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Carnelian Agate
Silicon Dioxide (SiO₂), a variety of Chalcedony
mineral
Coquina
Bioclastic Limestone (composed primarily of CaCO3)
sedimentary
Banded Agate (specifically Botryoidal/Orbicular Agate)
Silicon Dioxide (SiO2)
Mineral (variety of Chalcedony/Quartz)
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Banded Agate (specifically Moss or River Agate variety)
Cryptocrystalline Quartz (SiO2)
mineral
Rough Rose Quartz
Quartz (Silica - SiO2)
mineral
Opalite (Man-made Glass)
Synthetic Silicon Dioxide Glass (SiO2 + metal oxides)
Synthetic Mineral Simulant / Glass
Jasper (Red Jasper)
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary