Mineral (Refined Metal)

Slag (Industrial Glass Slag)

Amorphous Silicate Glass (often containing Al, Ca, Mg, and Ti oxides)

Lepidolite

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

Weathered quartz-rich nodule, possibly agate or chalcedony

Microcrystalline quartz (SiO₂), potentially with iron-oxide staining or a druzy coating

Pyrite

Iron Sulfide (FeS2)

Copper-bearing Quartz (likely Malachite on Quartz matrix)

Cu2CO3(OH)2 (Malachite) on SiO2 (Quartz)

Ferruginous Breccia

Breccia with Iron-rich (Hematite/Goethite) Matrix

Quartz-bearing pegmatite, possibly with mica

Granitic pegmatite; chiefly quartz (SiO₂) and feldspar, with probable mica and dark accessory minerals

Lepidolite

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

Granodiorite

Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)

Polished dark gray stone, likely basalt or andesite

Fine-grained mafic volcanic rock, commonly basalt (plagioclase ± pyroxene, olivine, and iron oxides)

Diamond (in a metal ring setting)

Diamond (Pure Carbon, C)

Weathered quartz-bearing rock, possibly iron-stained quartzite or granitic pegmatite

Indeterminate; likely quartz-rich silicate rock with iron-oxide staining (SiO₂-dominant)

Native copper

Copper (Cu), often with malachite, cuprite, or matrix minerals

Diamond ring

Diamond, crystalline carbon (C), set in a metal ring

Turquoise jewelry beads/earrings

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; possibly reconstructed or imitation turquoise

Turquoise cabochon ring

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

Possible metallic meteorite or iron-nickel bead

Unconfirmed; possible Fe–Ni alloy (kamacite/taenite)

Opalite

Synthetic Opalite (Man-made glass)

Aura Quartz (Pink/Rose Aura Quartz)

Silicon Dioxide (SiO2) bonded with Platinum and/or Silver

Weathered iron-rich rock, possibly limonite-bearing quartzite or ironstone

Limonite/goethite-rich Fe-oxide rock; exact identification requires testing

Black volcanic glass or basalt pendant

Likely basalt (fine-grained mafic rock), possibly obsidian (volcanic glass)

Serpentinite

Serpentinite (composed primarily of Serpentine-group minerals: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

Weathered gray-green igneous rock, likely basalt or andesite

Fine-grained mafic to intermediate volcanic rock; commonly plagioclase ± pyroxene, amphibole, and alteration minerals

Yellow faceted gemstone earrings, likely citrine or yellow beryl

Citrine: quartz, SiO₂; possible yellow beryl: Be₃Al₂Si₆O₁₈

Quartz with Chlorite / Greenschist

Quartz vein in Greenschist (SiO2 with Chlorite group minerals)

Titanium Aura Quartz (Bismuth-coated Druzy)

Silicon Dioxide (SiO2) with Titanium/Metal vapor coating

Green agate/chalcedony bead necklace

Microcrystalline quartz (SiO₂), likely green chalcedony or dyed green agate

Gold-bearing quartz vein fragment (probable placer gold specimen)

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

Quartz-rich pegmatite, possibly with mica and iron staining

Quartz (SiO₂) with probable muscovite/biotite mica and minor iron oxides

Blue Goldstone

Aventurine Glass

Gold Nugget

Native Gold (Au)

Weathered iron-rich rock, possibly limonite-bearing quartzite or altered basalt

Indeterminate; likely quartz (SiO₂) with iron oxides/hydroxides such as limonite/goethite

Aura Turquoise or Treated Turquoise Beads

Hydrated copper and aluminum phosphate (CuAl6(PO4)4(OH)8·4H2O) with metallic coating

Green Agate

Cryptocrystalline Quartz (SiO2)

Gold

Native Gold (Au)

Michigan Float Copper

Native Copper (Cu)

Possible weathered metal-rich rock or slag fragment

Uncertain; possibly iron-oxide-rich breccia or industrial slag

Diamond

Carbon (C)

Quartzite

Quartzite (primarily SiO2)

Pyrite

Iron Sulfide (FeS2)

Milky Quartz

Silicon Dioxide (SiO2)

Gold Nugget Jewelry

Native Gold (Au)