Mineral (Metal)

Blue Goldstone

Aventurine Glass (Silicon Dioxide with metal inclusions)

Peridot gemstone pendant

Olivine, gem-quality forsteritic olivine (approximately (Mg,Fe)₂SiO₄)

Rose Quartz

SiO2 (Crystalline Quartz with trace inclusions)

Smoky Quartz

Silicon Dioxide (SiO₂)

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8); variety of Orthoclase Feldspar

Note: Item is a Synthetic/Man-made Object

Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)

Pyrite

Iron Disulfide (FeS2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Ferruginous Sandstone (Gritstone)

Clastic sedimentary rock with iron-rich cement (FeO(OH)·nH2O)

Quartz Vein in Host Rock

Crystalline Silicon Dioxide (SiO2) in Igneous/Metamorphic Matrix

Silicon (Industrial Grade)

Elemental Silicon (Si)

Quartz Vein in Sedimentary Matrix

Silicon Dioxide (SiO2) with host rock

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in matrix

Blue cabochon gemstone ring

Uncertain; likely blue sapphire (corundum, Al₂O₃), blue topaz, or synthetic glass/spinel

Polished smoky quartz or brown chalcedony pebble

Silicon dioxide (SiO₂), likely quartz/chalcedony with iron-oxide inclusions

Gossan (Iron Hat) with Quartz and Chlorite

Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite

Green Slag Glass

Amorphous Silica Glass (Anthropogenic)

Blue Quartz / Glass Gemstone Pendant

SiO2 (Silicon Dioxide) or Synthetic Glass

Gold-bearing sulfide ore (tentative)

Native gold, likely with pyrite/chalcopyrite in quartz or altered rock

Milky Quartz

Silicon Dioxide (SiO2)

Rough Aquamarine

Beryl (Be₃Al₂Si₆O‑₁₈)

Lepidolite Polished Point

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz Vein Rock

Silicon Dioxide (SiO2)

Likely quartz cabochon in a ring

Quartz (SiO₂), possibly clear or milky quartz; identification is uncertain from the photograph

Black Onyx

Onyx (Silicon Dioxide, SiO2)

Diamond (in jewelry)

Cubic Carbon (C)

Lepidolite with Quartz

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Aura Rose Quartz

SiO2 (Silicon Dioxide with Titanium/Gold coating)

Pyrite (on host rock/ore)

Iron Sulfide (FeS2)

Turquoise ring stone (likely stabilized or dyed turquoise)

Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Pyrite

Iron Sulfide (FeS2)

Greenstone

Metamorphic Greenstone (Greenschist facies)

Polished native copper

Native copper (Cu), likely with cuprite/tenorite oxidation products

Pyrite in Quartz (Drill Core)

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions

Gossan with Copper Carbonate (Chrysocolla/Malachite)

Ferruginous Oxide (Gossan) with Cu2CO3(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)

Amethyst and clear gemstone ring

Amethyst (purple quartz, SiO₂), likely set with colorless quartz or glass accents

Bauxite (Iron-stained Chert / Ironstone Aggregate)

Hydrous aluminum oxide mixture (mainly Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Goethite α-Fe3+O(OH))

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in matrix

Note: Item is not a geological specimen

Guitar Components (Steel, Nickel, Plastic, Wood)

Pyrite on Limestone

Iron Disulfide (FeS2) in Calcium Carbonate (CaCO3) matrix

Gold-bearing quartz vein rock

Quartz (SiO₂) with probable native gold and iron-oxide staining