Mineral Description (Anthropogenic Material)

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Amethyst cluster

Amethyst, purple quartz (SiO₂)

Rose quartz heart

Quartz, silicon dioxide (SiO₂), pink variety

Mohave Turquoise (Composite/Stabilized)

Hydrated copper aluminium phosphate (CuAl6(PO4)4(OH)8·4H2O) with stabilizing resin and metallic inclusions

Uraninite (Pitchblende)

Uranium dioxide (UO2)

Green Calcite (Onyx Marble)

Calcium Carbonate (CaCO3)

Diamond

Diamond (C)

Diamond

Carbon (C)

Iron Meteorite

Iron Meteorite (primarily Kamacite and Taenite, Fe-Ni alloys)

Carborundum

Silicon Carbide (SiC)

Quartzite

Quartzite (SiO2-rich metamorphic rock)

Raw greenish-blue quartz-bearing mineral specimen

Likely fluorite or chalcedony/quartz; exact identification requires hardness and crystal tests

Diamond (Princess Cut Gemstone)

Carbon (C)

Ferruginous Sandstone (Ironstone)

Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)

Tumbled prehnite (probable)

Prehnite — Ca₂Al(AlSi₃O₁₀)(OH)₂

Polished brown stone, likely smoky quartz or jasper

Tentatively quartz (SiO₂), possibly smoky quartz; exact identification requires testing

Tumbled citrine or iron-stained quartz

Quartz (SiO₂), likely iron-oxide-stained or natural citrine

Amethyst-bearing quartz (rough/tumbled fragment)

Quartz, SiO₂; purple coloration from irradiation and trace iron

Milky quartz

Quartz (SiO₂), commonly massive or vein quartz

Smoky Quartz (Polished)

Silicon Dioxide (SiO2)

Carnelian Agate

Silicon Dioxide (SiO2) - Chalcedony with Iron Oxide impurities

Labradorite (Raw)

(Ca,Na)(Al,Si)4O8

Milky Quartz

Silicon Dioxide (SiO2)

Ferruginous Quartz

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)

Peridot (Olivine)

Olivine ((Mg, Fe)2SiO4)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Rose Quartz

Silicon dioxide (SiO2) with trace elements of Titanium, Iron, or Manganese

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Rose Quartz

Quartz (Silicon Dioxide - SiO2)

Moissanite

Silicon Carbide (SiC)

Ferruginous Quartz

Quartz (Silicon Dioxide, SiO2) with iron oxide inclusions

Milky Quartz/Clear Quartz Cluster

Silicon Dioxide (SiO2)

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Pink Granite / K-Feldspar

Alkali feldspar granite / Potassium feldspar (Microcline/Orthoclase)

Quartz geode or drusy quartz cluster

Quartz (silicon dioxide, SiO₂), likely microcrystalline quartz lining a cavity

Milky quartz

Quartz (silicon dioxide, SiO₂)

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

Rhodonite (in matrix)

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Precious Opal

Hydrated Silica (SiO2·nH2O)