Mineral (Silicate Variety)

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Dragon Blood Jasper

Epidote with Red Piedmontite (silicate)

Moonstone

Potassium aluminum silicate (KAlSi3O8)

Chrysocolla in Matrix

Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O

Green Aventurine

SiO2 (Silicon Dioxide with inclusions of Fuchsite mica)

Sandstone

Arenite

Chrysocolla

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)

Metallic meteorite fragment (probable stony-iron or iron meteorite)

Undetermined meteoritic Fe–Ni alloy with silicate minerals

Epidote in Quartz (Unakite-like specimen)

Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)) in Quartz (SiO2)

Likely weathered gneiss or granite fragment

Quartz–feldspar–mica aggregate; probably granitoid gneiss, identification uncertain from the photograph

Bauxite

Aluminium ore / Hydrated aluminium oxides (AlOx(OH)3-2x)

Weathered, iron-stained rock fragment

Unidentified silicate-rich rock; the image is insufficient for a reliable species identification

Diorite

Phaneritic Intermediate Plutonic Rock

Granite (likely weathered quartz-bearing granite)

Granite; primarily quartz, feldspar, and mica/amphibole

Green Opal / Common Opal

Hydrated Silicon Dioxide (SiO2·nH2O)

Snowflake Obsidian

Spherulitic Obsidian (Amorphous Volcanic Glass with Cristobalite inclusions)

Blue Slag Glass

Ferro-silicate glass (Slag)

Coarse-grained marble or calcite-rich metamorphic rock

Calcite (CaCO₃), likely marble with mica and silicate minerals

Sandstone

Arenite

Copper Ore (Malachite, Azurite, and Chalcopyrite in Host Rock)

Copper-bearing polymetallic mineral aggregate (Cu-minerals)

Weathered quartz-rich pebble

Likely quartz-bearing rock; precise identification is limited by the blurry image

Moss Agate

Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxide

Sodalite in Matrix (Sunset Sodalite)

Sodalite Na8(Al6Si6O24)Cl2

Blue-gray quartz-rich rock fragment, likely crushed granite or gneiss

Granite–gneiss aggregate; chiefly quartz (SiO₂), feldspar, and mica/amphibole

Banded Calcite (Mexican Onyx)

Calcium Carbonate (CaCO3)

Possible iron-rich meteorite or metallic sulfide-bearing rock

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

Jadeite

NaAlSi2O6 (Sodium Aluminum Silicate)

Eudialyte in Matrix

Eudialyte [Na15Ca6(Fe,Mn)3Zr3(Si25O73)(O,OH,H2O)3(Cl,OH)2]

Green Jasper

Silicon Dioxide (SiO2) with impurities

Tumbled Stone

Silicon dioxide / Various silicates

Quartz (Rock Crystal) with minor impurities

Quartz (SiO2)

Sandstone

Arenite

Banded Iron Formation (BIF)

Banded Iron Formation (predominantly Hematite Fe2O3 and Magnetite Fe3O4 with Chert SiO2)

Iron Slag

Ferrous Slag (Silicate/Oxide mixture)

Talc

Talc (Mg₃Si₄O₁₀(OH)₂)

Limonite (Ironstone)

Limonite (mixture of hydrated iron oxides, primarily Goethite α-FeO(OH))

Satin Spar (Gypsum)

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Granite

Intrusive Igneous Rock

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

Uncertain; likely Fe-oxide/hydroxide–stained mafic rock (hematite Fe₂O₃, goethite FeO(OH), and silicates)

Porphyritic granite (granite porphyry)

Quartz–feldspar porphyritic granite; mainly quartz, K-feldspar, plagioclase, and biotite/hornblende

Weathered tan mineral/rock fragment

Indeterminate from image; possibly iron-stained quartz, feldspar-rich rock, or limonite-bearing material

Bauxite

Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))