Mineral (Refined Metal)

Smelter Slag

Anthropogenic Silicate Slag

Diamond ring

Diamond (crystalline carbon, C)

Diamond jewelry

Diamond (crystalline carbon, C)

Iron-stained brecciated quartz vein rock

Quartz-rich hydrothermal breccia; predominantly SiO₂ with iron oxides/hydroxides (hematite, goethite) and likely minor host-rock minerals

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Diamond

Carbon (C)

Coarse-grained granite pegmatite

Granitic pegmatite; mainly quartz (SiO₂), feldspar, and mica

Rutilated quartz (likely a cabochon set in metal)

Quartz, SiO₂, containing rutile inclusions (TiO₂)

Aquamarine

Beryllium aluminum silicate (Be3Al2Si6O18)

Iron-stained quartz-rich rock, likely brecciated quartz vein

Quartz (SiO₂) with iron oxides/hydroxides, chiefly hematite and goethite; possibly limonite

Slag Glass

Vitreous Silicate Residue

Limonite (Ironstone)

Hydrated Iron(III) Oxide-hydroxide (FeO(OH)·nH2O)

Polished unakite pendant

Unakite: quartz + epidote + pink potassium feldspar

Vesicular basalt (possible scoria)

Basaltic volcanic rock; chiefly plagioclase, pyroxene, and iron-rich minerals, with vesicles formed by trapped gas

Conglomeratic breccia (possibly polymictic volcanic breccia)

Polymictic breccia; clasts in a fine-grained volcanic or sedimentary matrix

Slag Glass

Amorphous Silica Glass (with metal oxide inclusions)

Quartz-rich pegmatite with green epidote or chlorite

Pegmatitic quartz–feldspar rock, likely containing epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH)) and/or chlorite

Polished banded agate (probable)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide inclusions

Quartz–iron-oxide breccia or weathered quartz-bearing rock

Quartz (SiO₂) with limonite/goethite and possibly iron sulfides in a brecciated host

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Dyed Agate Slice

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Aventurine (Green)

Silicon Dioxide (Quartz variety) containing Fuchsite - SiO2 + K(Al,Cr)2AlSi3O10(OH)2

Silicon

Element Si

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Phyllosilicate)

Limonite/goethite-rich ironstone

Limonite (hydrated iron oxides, chiefly FeO(OH)·nH₂O), commonly mixed with goethite and hematite

Possible iron-rich concretion or weathered ironstone

Goethite/hematite-bearing limonite concretion (tentative)

Sandstone (Quartz-rich)

Arenite (SiO2 based clastic rock)

Mohave Turquoise (Composite/Stabilized)

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

Pale green tumbled mineral, likely prehnite

Prehnite — Ca₂Al(AlSi₃O₁₀)(OH)₂; identification is provisional from the photograph

Gold Ore in Matrix

Native Gold (Au) in Quartz/Host Rock

Slag

Anthropogenic glassy silicate

Green aventurine cabochon earrings

Aventurine quartz (SiO₂), likely green quartzite with fuchsite mica

Porphyritic basalt

Basalt with pink potassium-feldspar phenocrysts; likely alkaline or trachybasaltic composition

Synthetic Zinc/Polycarbonate Composite (Bey-specimen)

Zinc Alloy (Zamak 3) with Polycarbonate (C15H16O2)n Overlay

Amber (likely a small polished amber piece)

Natural fossil resin; amber is an organic mineraloid, not a crystalline mineral. The image alone cannot confirm authenticity.

Gold

Gold (Au)

Purple Lepidolite with Quartz

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

Lepidolite with Quartz

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

Sandstone

Arenite (Siliclastic sedimentary rock), SiO2 + various minerals

Copper-bearing Quartz (with Malachite and Iron Oxides)

Quartz (SiO2) with Malachite (Cu2CO3(OH)2) and Hematite/Limonite (Fe2O3)