Greenschist
Greenschist (Chlorite-Epidote-Actinolite Schist)
metamorphic
Category
Mineral (Extraterrestrial)
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Gneiss
Gneiss (a type of metamorphic rock)
Metamorphic Rock
Bumblebee Jasper
Fossiliferous Volcanic Rock (composed of Calcium Carbonate, Manganese Oxides, and Arsenic Sulfides)
igneous
Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Blue Lace Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Gold Nugget
Native Gold (Au)
mineral
Amethyst (Tumbled)
Silicon Dioxide (SiO2) with iron impurities
mineral
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Limonite after Pyrite (Pseudomorph)
FeO(OH)·nH2O following FeS2
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18)
mineral
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with Iron impurities
mineral
Gold Ore in Quartz/Schist
Auriferous Quartz and Sulfide-bearing Schist
Metamorphic/Igneous (Hydrothermal)
Raw Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Dendritic Jasper
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
sedimentary
Quartz Druzy Geode Fragment
Silicon Dioxide (SiO2)
mineral
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
mineral
Septarian Nodule (Dragon Stone)
Septarian concretion (composition: CaCO3 - Calcite, Aragonite, and Siderite/Limestone)
sedimentary
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Dalmatian Stone (Dalmatian Jasper)
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst (Quartz)
Silicon Dioxide (SiO2) with Iron impurities
mineral
Sunstone
Feldspar (variety Oligoclase or Labradorite), (Ca,Na)(Al,Si)4O8
mineral
Amazonite
Tectosilicate (variety of Microcline), K(AlSi3O8)
mineral
Ruby in Kyanite
Corundum (Al2O3) in Kyanite (Al2SiO5)
metamorphic
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
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Ocean Jasper
Orbicular Jasper (variety of Chalcedony/Quartz, SiO2)
sedimentary
Botryoidal Chalcedony in Geode/Vug
Silicon Dioxide (SiO2)
mineral
Amethyst
Quartz (Silicon Dioxide with Iron impurities), SiO2
mineral
Pyrite Concretion (Grapestone)
Iron Sulfide (FeS2) Concretion
sedimentary
Nuummite
Antigorite-Anthophyllite complex
metamorphic
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Carnelian
Carnelian (SiO2)
mineral
Amethyst (Tumbled Quarz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Ocean Jasper
Orbicular Jasper (Silicon Dioxide with impurities like Hematite and Chlorite, SiO2)
sedimentary
Raw Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Moonstone with Black Tourmaline
Orthoclase (KAlSi3O8) with Schorl inclusions
mineral
Nuummite
Antophyllite-Gedrite (Orthorhombic amphiboles)
metamorphic
Amethyst (Chevron or Banded Amethyst)
Silicon Dioxide (SiO2) with trace Iron (Fe)
mineral