Amethyst
Silicon dioxide / Violet Quartz (SiO2)
mineral
Category
Mineral (Extraterrestrial)
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Epidosite
Epidosite (consisting primarily of Epidote Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz SiO2)
metamorphic
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2) with various inclusions
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with ferric impurities)
mineral
Pink Quartz (Rose Quartz variant)
Silicon Dioxide (SiO2)
mineral
Amethyst Quartz Pebble
Silicon Dioxide (SiO2) with iron impurities
mineral
Copper Ore with Chrysocolla and Azurite
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) / Cu3(CO3)2(OH)2 (Azurite)
mineral
Chevron Amethyst
Silicon Dioxide (SiO2)
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Black Tourmaline in Quartz
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4) in Silicon Dioxide (SiO2)
igneous
Tiger's Eye
Pseudomorph of quartz after crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Bornite (Peacock Ore)
Bornite (Copper iron sulfide - Cu5FeS4)
mineral
Iron Meteorite
Iron-Nickel Alloy (Kamacite and Taenite)
mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Ocean Jasper
Orbicular Jasper / Chalcedony (SiO2)
Mineral
Gold Ore in Quartz
Auriferous Quartz (Gold: Au; Quartz: SiO2)
Mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2 with iron impurities)
mineral
Gold Nugget
Native Gold (Au)
mineral
Labradorite
Labradorite, (Ca, Na)(Al, Si)4O8
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Fuchsite (Chrome Mica)
K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Citrine (likely Heat-Treated Amethyst)
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with iron impurities)
mineral
Amethyst
Amethyst (SiO2)
mineral
Geode with Quartz and Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Rose Quartz
Crystalline Silicon Dioxide with trace Titanium/Manganese/Iron (SiO2)
mineral
Schist (Diamond Drill Core)
Mica Schist
metamorphic
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Rough Corundum (likely Sapphire/Zircon-bearing)
Aluminium Oxide (Al2O3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Granite Pebble
Granitoid (Felsic Plutonic Rock)
igneous
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Sand (Construction Grade)
Unconsolidated siliciclastic sediment (primarily SiO2)
sedimentary
Mica Schist
Mica Schist (primarily Muscovite and Quartz)
metamorphic
Ferruginous Sandstone (Gozzan/Ironstone)
Arenite with Limonite/Goethite cement (FeO(OH)·nH2O)
sedimentary
Basalt
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Mica Schist
Mica Schist (primarily Muscovite or Biotite-rich sequence)
metamorphic
Shale or Argillite
Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)
Sedimentary or Metamorphic (low grade)
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral