Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
mineral
Category
Igneous And Metamorphic
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Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
mineral
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Likely milky quartz
Quartz (SiO₂)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Quartz
Quartz (Silicon Dioxide) with inclusions, SiO2
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Black Tourmaline
Schorl (Sodium iron aluminum borosilicate), NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz (Tumbled)
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2) with Hematite/Limonite
mineral
Clear quartz (rock crystal)
Quartz, silicon dioxide (SiO₂)
mineral
Tumbled magnetite (likely)
Magnetite, Fe₃O₄
mineral
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Citrine
Silicon dioxide (SiO2)
mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Tumbled milky quartz
Quartz (SiO₂), likely translucent white variety
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal (specifically Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Unakite
Unakite Epidosite (Granite with epidote and orthoclase)
metamorphic
Likely biotite mica in a host rock
Biotite, a dark mica-group mineral; composition varies, broadly K(Mg,Fe)₃AlSi₃O₁₀(F,OH)₂
mineral
Sapphire
Corundum (Al2O3)
gemstone
Polished clear quartz cabochon
Quartz (silicon dioxide, SiO₂)
mineral
Citrine
Silicon dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Greasy Quartz (likely carved Milky Quartz or Aventurine)
Silicon Dioxide (SiO2)
mineral
Epidote
{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
mineral
Citrine Quartz (Raw)
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst (Purple), Sulfur (Yellow), and Blue Apatite
SiO2 (Quartz), S (Native Sulfur), Ca5(PO4)3(F,Cl,OH) (Apatite Group)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Lemon Quartz (Orizaba/Citrinated Quartz)
Silicon Dioxide (SiO2) with iron impurities/treatment
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary