Sedimentary (Processed Mineral Product)

Weathered basaltic rock

Basalt, likely altered basalt (plagioclase–pyroxene ± olivine; possible iron-oxide staining)

Limestone

Calcium Carbonate (CaCO3)

Copper-Bearing Sulfide Ore (likely Chalcopyrite or Bornite)

Chalcopyrite (CuFeS2) or Bornite (Cu5FeS4) in host rock

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Lepidolite

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

Sandstone Pebble

Sandstone (SiO2 rich clastic rock)

Botryoidal chrysocolla-rich copper ore

Chrysocolla, hydrated copper phyllosilicate (approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O), likely with malachite and quartz/gangue

Malachite

Copper Carbonate Hydroxide, Cu2CO3(OH)2

Blue slag glass / industrial smelter slag

Man-made iron-rich silicate slag; composition variable, commonly Fe–Ca–Mg–Al silicates with glassy phases

Native bismuth

Bismuth (Bi), commonly with a naturally oxidized surface

Iron-stained rock fragment

Likely limonite/goethite-stained rock; the underlying rock cannot be identified confidently from the image

Kyanite (in Schist Matrix)

Kyanite (Al2SiO5)

Limestone

Calcium Carbonate (CaCO3)

Chalk

Calcium Carbonate (CaCO3)

Note: Item is not a geological specimen

Guitar Components (Steel, Nickel, Plastic, Wood)

Likely iron-rich rock or weathered metallic mineral fragment

Uncertain; possibly limonite/goethite or iron-bearing slag

Bismuth crystal

Bismuth (Bi), synthetic laboratory-grown crystal

Tumbled amethyst

Quartz, SiO₂; purple coloration from iron-related defects and irradiation

Siltstone

Siltstone (primarily composed of microcrystalline Quartz and Feldspar)

Limestone

Calcium Carbonate (CaCO3)

Blue kyanite

Kyanite (Al₂SiO₅)

Rose Quartz

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

Quartz with Tourmaline and Iron Staining

Silicon Dioxide (SiO2) with Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)

White quartz pebbles

Quartz, SiO₂ (likely milky quartz)

Limonite Geode (Ironstone Concretion)

Limonite [FeO(OH)·nH2O] with possible Quartz or Calcite interior

Sulfur on Aragonite

Sulfur (S) and Aragonite (CaCO3)

Gypsum rosette cluster (desert rose)

Gypsum, calcium sulfate dihydrate (CaSO₄·2H₂O), rosette habit

Red Granite

Phaneritic Felsic Intrusive Igneous Rock

Granite

Granite

Milky quartz

Quartz (silicon dioxide, SiO₂)

Botryoidal chalcedony (agate/geode fragment)

Chalcedony, microcrystalline SiO₂; likely quartz with minor iron-oxide and carbonate inclusions

Granite

Granitoid (dominated by Quartz and Feldspar)

Possible industrial slag or basaltic volcanic glass

Likely iron-rich vitreous slag; natural alternative: basaltic glass (tachylite)

Desert Rose

Gypsum (CaSO4-2H2O) or Baryte (BaSO4)

Mixed gravelly conglomeratic road aggregate

Polymictic clast-supported conglomerate or fill; composition varies, commonly quartz, feldspar, basalt, and weathered rock fragments

Likely porphyritic basalt (dark volcanic rock with light mineral patches)

Basalt, a fine-grained mafic igneous rock; pale patches may be plagioclase or secondary minerals

Blue Kyanite

Kyanite (Al2SiO5)

Red-orange sunstone (likely aventurine feldspar) bead bracelet

Feldspar, commonly oligoclase or labradorite with copper inclusions; composition varies by source

Kyanite in Quartz

Kyanite (Al2SiO5) with Quartz (SiO2) matrix

Mica Group Minerals

There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).

Quartz crystal pendant (likely smoky quartz or iron-stained quartz)

Quartz, silicon dioxide (SiO₂)

Black tourmaline beads (likely schorl)

Schorl, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄