Mineral (Metal)

Diamond-set earring

Diamond (carbon, C); crystal structure: cubic

Likely anthracite coal fragments

Anthracite; predominantly carbon (C), with minor mineral ash and sulfides

Turquoise-colored ring stone (possibly turquoise or imitation)

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; identity cannot be confirmed from the image

Likely gold-colored metal ring with a possible gemstone

Uncertain; possibly gold alloy (Au) with a small quartz or glass-like setting

Lepidolite

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

Rounded greenish-gold rock or mineral pebble

Indeterminate; possibly serpentine-rich stone, weathered sulfide, or iron-stained metamorphic rock

Quartz-rich hydrothermal mineral specimen, possibly vanadinite-bearing matrix

Quartz (SiO₂) with unidentified red-brown accessory minerals; exact species requires testing

Polished hematite bead (probable)

Hematite, Fe₂O₃

Likely iron-rich rock or metallic mineral fragment

Uncertain; possibly limonite/goethite-rich material or weathered iron meteorite fragment

Blue Topaz

Aluminum Silicate Fluoride Hydroxide Al2SiO4(F,OH)2

Granite

Phaneritic Plutonic Igneous Rock (Rich in SiO2)

Gossan

Iron-rich regolith (mainly Limonite and Goethite, FeO(OH)·nH2O)

Blue chalcedony crystal pendant

Chalcedony, microcrystalline quartz (SiO₂), likely blue chalcedony or dyed quartz

Milky Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Iron-stained brecciated quartz vein rock

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

Polished turquoise cabochon pendant

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

Black tourmaline pendant

Schorl tourmaline, NaFe3Al6(BO3)3Si6O18(OH)4

Smoky quartz ring

Quartz (SiO₂), likely smoky quartz; the surrounding stones and metal cannot be identified reliably from the image.

Likely weathered mafic rock (basalt or gabbro)

Basalt–gabbroic rock; chiefly plagioclase feldspar, pyroxene, and possibly olivine

Amethyst

Silicon dioxide (SiO2) with iron impurities

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

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)

Green jade-like cabochon pendant

Possibly nephrite (fine-grained tremolite–actinolite); the photo alone cannot confirm the material

Smelter Slag

Anthropogenic Silicate Slag

Polished labradorite cabochon

Labradorite, plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈

Bull Quartz (White Quartz)

Silicon Dioxide (SiO2)

Opalite

Synthetically produced glass (Silicon Dioxide with metallic inclusions)

Turquoise ring cabochon

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; likely stabilized or treated matrix turquoise

Hypersthene

Hypersthene (Magnesium Iron Silicate - (Mg,Fe)SiO3)

Mystic Topaz

Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)

Likely native metallic mineral specimen

Uncertain from photograph; possibly pyrite (FeS₂) or a sulfide-rich metallic ore

Quartz / Calcite Vein Rock

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)

Blue aventurine or dyed blue quartzite pendant

Quartz (SiO₂), likely aventurine quartz/quartzite; exact identification requires testing

Limonite/goethite-rich ironstone

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

Quartz Veinated Sandstone or Siltstone

Silicon Dioxide (SiO2) within a clastic sedimentary matrix

Possible iron-rich concretion or weathered ironstone

Goethite/hematite-bearing limonite concretion (tentative)

Likely golden mica-bearing metamorphic rock

Micaceous schist, possibly biotite schist; composition commonly quartz + feldspar + biotite/phlogopite mica

Granite

Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)