Small metallic mineral fragment
Indeterminate; possibly galena, hematite, magnetite, or metallic meteorite fragment
mineral
Category
Mineral, Metal (Element)
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Blue topaz-style pendant (stone identity uncertain)
Possibly blue topaz (Al₂SiO₄(F,OH)₂); the image cannot confirm whether the stone is natural or synthetic
gemstone
Pegmatitic pink feldspar–quartz rock
Granitic pegmatite; chiefly microcline/orthoclase feldspar (KAlSi₃O₈), quartz (SiO₂), and minor mica
igneous
Silver Nugget
Native Silver (Ag)
mineral
Fossilized Bone Fragment
Permineralized Skeletal Element (Likely Vertebrate)
sedimentary
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si)4O10(F,OH)2)
mineral
Milky Quartz with Matrix
Silicon Dioxide (SiO2)
mineral
Honey/Golden Calcite specimens
Calcite, calcium carbonate (CaCO₃)
mineral
Quartz Vein in Host Rock
Silicon dioxide (SiO2) veins in metamorphic/igneous host rock
igneous
Diamond (Cut Specimen)
Diamond (pure carbon, C)
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Diamond
Carbon (C)
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Fluorite on Matrix
Calcium Fluoride (CaF2)
mineral
Rough Diamond
Pure Carbon (C)
mineral
Ruby
Corundum (Al2O3)
mineral
Aluminum Slag
Anthropogenic Aluminum (Al)
mineral
Silver (Native Element)
Ag (Argentum)
mineral
Zinc Alloy (Silver-plated)
Zinc Alloy Casting (Zn-Al-Mg-Cu)
mineral (refined metal)
Quartz-rich pegmatitic rock (likely milky quartz with feldspar and dark mica)
Pegmatite; predominantly quartz (SiO₂), with feldspar and biotite/hornblende
igneous
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Lepidolite on Pegmatite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Silver
Ag (Native Silver)
mineral
Gold (10K Alloy)
Aurum (Au) with alloying metals (Cu, Ag, Zn)
mineral
Purple fluorite-bearing mineral specimen
Fluorite (calcium fluoride, CaF₂), possibly with quartz or chalcedony matrix
mineral
Rough Diamond
Diamond (pure Carbon, C)
mineral
Diamond
Native Carbon (C)
mineral
Aluminum Slag
Anthropogenic Aluminum (Al)
mineral
Unidentified gray metallic object
Not determinable from the image; likely a metal screw or manufactured fastener rather than geological material
mineral
Quartz-rich pegmatitic rock, possibly milky quartz with mica
Pegmatite dominated by quartz (SiO₂), with probable muscovite mica and feldspar
igneous
Diamond in Kimberlite
Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)
igneous
Bismuth
Native Bismuth (Bi)
mineral
Man-made Jewelry Charm (Enameled Metal)
Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.
Synthetic / Manufactured Artifact
Galena in Quartz Matrix
Lead Sulfide (PbS) in Silicon Dioxide (SiO2)
mineral
Bismuth Crystal
Bismuth (Bi)
mineral
Lepidolite
K(Li,Al)3(Al,Si)4O10(F,OH)2 (Lithium-bearing phyllosilicate)
mineral
Sandstone (Quartzose Sandstone)
Arenite (SiO2 based)
sedimentary
Rainbow fluorite
Fluorite (calcium fluoride, CaF₂)
mineral
Lepidolite with Rubellite Tourmaline
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite mica)
mineral
Mica-rich pegmatite, likely muscovite with quartz and feldspar
Granitic pegmatite; predominantly muscovite mica (KAl₂(AlSi₃O₁₀)(OH)₂), with quartz (SiO₂) and feldspar
igneous
Blue slag glass / industrial smelter slag
Man-made iron-rich silicate slag; composition variable, commonly Fe–Ca–Mg–Al silicates with glassy phases
mineral
Silver (Native Element)
Ag (Native Silver), with minor Copper (Cu)
mineral