Mineral, Metal (Element)

Diamond

Diamond (pure Carbon, C)

Arfvedsonite

Arfvedsonite [Na3(Fe2+,Mg)4Fe3+Si8O22(OH)2]

Diamond

Diamond (Pure Carbon, C)

Yellow Beryl

Beryl (Be3Al2(SiO3)6)

Limestone with Lichen/Algae

Sedimentary Calcium Carbonate (CaCO3)

Mineral Sand (Heavy Mineral Sand Concentrate)

Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite

Diamond (in jewelry setting)

Carbon (C)

Diamond (in jewelry setting)

Adamantine Carbon (C)

Fuchsite

Chromium-bearing Muscovite - K(Al,Cr)2(AlSi3O10)(OH)2

Copper Ore with Chalcocite

Copper sulfide (Cu2S) with associated copper-bearing minerals

Chalcopyrite (or Pyrite Ore)

CuFeS2 (Copper Iron Sulfide)

Blue Celestine

Celestine (SrSO4)

Blue Quartz

Silicon Dioxide (SiO2) with fibrous inclusions (such as tourmaline, magnesio-riebbeckite, or crocidolite)

Pegmatitic granite (likely feldspar–quartz–mica rock)

Granitic pegmatite; chiefly K-feldspar and quartz, with mica and iron-oxide staining

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

Quartz-bearing feldspar pegmatite (likely with mica/tourmaline)

Granitic pegmatite; chiefly quartz (SiO₂) and feldspar, with dark mica or tourmaline

Orgonite Pyramid (containing Amethyst and mixed minerals)

Silicon Dioxide (SiO2) in synthetic resin

Unidentified metallic mineral or metal-like specimen

Indeterminate from image; possibly galena (PbS) or a metallic sulfide

Pegmatitic mica-quartz-feldspar specimen

Granitic pegmatite, chiefly quartz (SiO₂), feldspar, and muscovite/biotite mica

Quartz-rich pegmatite specimen

Pegmatite, composed mainly of quartz (SiO₂), with probable feldspar and mica

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

Diamond

Diamond (pure Carbon, C)

Granite

Intrusive Igneous Rock

Lepidolite

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

Industrial slag (iron/copper smelting slag)

Multiphase vitreous metallurgical slag; commonly iron-silicate glass with metal-oxide and metallic inclusions

Rough Diamond

Carbon (C)

Pink quartz crystal, possibly rose quartz

Quartz (silicon dioxide, SiO₂), likely pink quartz/rose quartz

Diamond (specifically Blue Diamond color appearance)

Carbon (C) with trace Boron

Pyrite

Iron Disulfide (FeS2)

Beaded gemstone bracelet

Indeterminate; likely small polished mineral beads, possibly turquoise or dyed stone, with metal and glass components

Diamond

Carbon (C)

Opalite

Synthetic Opalized Glass / Man-made Glass

Silver (Native Element)

Silver (Ag) in an alloy of 90% Silver and 10% Copper

Quartz-rich pegmatite specimen

Pegmatite, composed mainly of quartz (SiO₂), feldspar, and minor mica/iron oxides

Quartz-rich pegmatite (likely feldspar–quartz rock)

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

Native Copper with Cuprite and Quartz

Copper (Cu), Cuprite (Cu2O), Quartz (SiO2)

Silver (Sterling Silver)

Argentum (Ag) mixed with Copper (Cu); Formula: Ag+Cu

Diamond (in jewelry)

Carbon (C)

Gold Nugget

Native Gold (Au)

Gold Nugget / Gold Flakes

Native Gold (Au)

Fluorite

Calcium Fluoride (CaF2)

Raw Topaz (or Smoky Quartz)

Al2SiO4(F,OH)2 / Silicon Dioxide (SiO2)