Mineral (Processed Metal)

Granite

Granite (felsic intrusive igneous rock)

Possible iron-rich meteorite or metallic sulfide-bearing rock

Unconfirmed; candidates include stony-iron meteorite, iron meteorite, or pyrite-bearing terrestrial rock

Quartz-rich hydrothermal ore rock, likely gold-bearing quartz vein

Milky quartz (SiO₂) with iron-oxide staining and probable sulfide minerals; host rock may be schist or altered granite

Goldstone

Man-made glass infused with copper crystals

Sunstone

Oligoclase (Plagioclase Feldspar), (Ca,Na)(Al,Si)4O8

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2) and Slate/Shale

Lepidolite in Quartz (Lithium-bearing Ore)

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) and Quartz (SiO2)

Likely weathered copper-bearing rock

Indeterminate from the photo; possibly malachite-bearing rock (Cu₂CO₃(OH)₂)

Copper Ore

Mixed copper sulfides/oxides in gangue matrix

Lepidolite

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

Polished orange chalcedony pendant

Chalcedony, microcrystalline quartz (SiO₂), likely orange carnelian or orange agate

Tiger's Eye

Silicified Crocidolite Pseudomorph (SiO2 with iron oxides)

Possible weathered metallic mineral specimen

Uncertain; possibly native copper-bearing rock or iron sulfide in a gray host matrix

Granite

Felsic intrusive igneous rock

Granite

Intrusive Igneous Rock

Quartz-veined Basalt

Metabasalto / SiO2 vein in mafic rock

Chalcopyrite (Peacock Ore)

Copper Iron Sulfide (CuFeS2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Chalcopyrite-bearing Ore

Chalcopyrite (CuFeS2)

Beryl (Variety: Aquamarine)

Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)

Beryl (var. Heliodor or Aquamarine)

Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)

Celestine (Celestite)

Strontium sulfate (SrSO4)

Likely quartz-rich rock fragment

Quartz (SiO₂), possibly a fragment of quartzite or silica-rich slag

Ruby (mounted cabochon)

Corundum, Al₂O₃; red color typically from chromium

Granite

Felsic intrusive igneous rock

Granite

Intrusive igneous rock primarily composed of quartz, alkali feldspar, and plagioclase

Granite

Intrusive igneous rock

Galena

Lead(II) sulfide (PbS)

Cobalt Blue Glass / Cullet Glass

Silicon dioxide (Amorphous man-made glass)

Silver Nugget

Native Silver (Ag)

Gold Nugget

Native Gold (Au)

Green faceted gemstone earrings, likely synthetic emerald-colored glass or cubic zirconia

Undetermined; possible glass (amorphous silicate) or synthetic cubic zirconia (ZrO₂)

Merlinite (dendritic opal)

Common opal (hydrated amorphous silica, SiO₂·nH₂O) with dark manganese-oxide dendrites; the trade name “merlinite” is also applied to other patterned stones.

Amygdaloidal Basalt

Basalt with secondary mineral infilling

Pegmatitic granite (likely feldspar–quartz–mica rock)

Coarse-grained granitic pegmatite; primarily quartz (SiO₂), feldspar, and mica, with possible epidote or chlorite

Pyrite in Quartz

FeS2 (Iron Pyrite) with SiO2 (Quartz)

Quartzite (Water-Worn)

Quartzite (SiO2)

Rounded river pebble, possibly iron-rich quartzite or basalt

Indeterminate from image; likely fine-grained basalt (mafic silicate rock) or ferruginous quartzite

Pavé-set diamond ring

Diamond (crystalline carbon, C)

Lepidolite

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

Quartz Vein / Milky Quartz

Silicon Dioxide (SiO2)

Sea Glass (Frosted Glass)

Amorphous Silica (SiO2) with various metal oxide impurities