Sedimentary (If Natural Jasper) Or Artificial (If Slag)

Pink Dyed Agate

Chalcedony (SiO2) with artificial dyes

Weathered iron-rich rock fragment

Likely limonite/goethite-bearing material; exact identification requires testing

Red Tiger's Eye

Pseudomorph of Quartz after Crocidolite (Silicon Dioxide: SiO2)

Peacock ore (iridescent bornite/chalcopyrite)

Bornite (Cu₅FeS₄), commonly sold as heat-treated chalcopyrite (CuFeS₂)

Amethyst (Cabochon)

Silicon Dioxide (SiO2) with iron impurities

Small metallic-gold mineral fragment, possibly pyrite

Pyrite (FeS₂), if confirmed

Unidentified dark, flat specimen

Indeterminate; image resolution is insufficient for mineral identification

Pink Dyed Agate

Silicon Dioxide (SiO2) - Variety Agate

Small gray translucent stone, possibly quartz or glassy mineral

Uncertain; likely microcrystalline quartz (SiO₂), but the image is insufficient for definitive identification

Dyed Quartzite

Metamorphosed Quartz (SiO2) with synthetic pigment

Dyed Pink Quartzite

Tumbled and Dyed Quartzite (SiO2 with dye treatment)

Dyed Agate

Chalcedony (SiO2 with impurities)

Blue Banded Agate (Dyed)

Silicon Dioxide (SiO2) - Chalcedony variety

Aura Quartz (Coated Quartz)

Silicon Dioxide (SiO2) treated with metallic vapor

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Dragon Vein Agate (Dyed/Treated)

Agate (SiO2)

Slag

Ferrous Slag (Siliceous industrial waste)

Dalmatian Stone

Peralkaline Feldsphathic Igneous Rock

Possible tektite (natural impact glass)

Impact glass; composition and origin cannot be confirmed from the image

Polished botryoidal jasper/chalcedony (likely ocean jasper)

Microcrystalline quartz, SiO₂, with iron-oxide and other mineral inclusions

Green sea glass (likely bottle glass)

Man-made soda-lime silicate glass; not a natural mineral

Rainbow-coated amethyst (likely treated quartz)

Quartz, SiO₂; purple color from iron-related defects. The iridescent surface appears artificially coated, often with a titanium-based film.

Dyed Blue Agate Slice

Silicon Dioxide (SiO2) with artificial dye

Blue Agate (Dyed)

Silicon Dioxide (SiO2)

Porphyritic Basalt (likely artificially dyed or altered)

Basalt with plagioclase phenocrysts (likely treated)

Slag (Industrial By-product)

Glassy silicate or metallic smelting residue

Carnelian

Carnelian (Silicon Dioxide - SiO2 with Hematite impurities)

Lemon Quartz (Orizaba/Citrinated Quartz)

Silicon Dioxide (SiO2) with iron impurities/treatment

Red Tiger's Eye

SiO2 (Silicon Dioxide) - Pseudomorph of Quartz after Crocidolite

Blue quartz (likely tumbled dyed or coated quartz)

Quartz, silicon dioxide (SiO₂)

Blue Dyed Agate

Chalcedony (SiO2) with artificial pigment

Magnetic Hematite

Iron(III) oxide (Fe2O3) - Man-magnetized ceramic/barium ferrite composite

Purple Dyed Agate Geode (Banded Chalcedony)

Silicon Dioxide (SiO2) - variety: Agate

Tumbled blue-green chalcedony (likely dyed agate or chrysoprase)

Microcrystalline quartz, SiO₂; chalcedony/agate variety

Dyed Alum or Dyed Quartz (Ornamental Crystal)

Silicon Dioxide (SiO2) or Potassium Alum [KAl(SO4)2·12H2O]

Rounded iron-rich stone, likely hematite-bearing sandstone or ironstone

Hematite/goethite-bearing ferruginous sandstone or ironstone; composition cannot be confirmed from appearance alone

Blue Obsidian (Cullet Glass)

Silicon Dioxide (Amorphous Glass)

Dyed Blue Quartz

Silicon Dioxide (SiO2) with artificial pigment

Quartz-rich river pebble

Likely quartz-rich granitic rock; mainly quartz (SiO₂), with possible feldspar and mica

Asphalt Concrete

Bituminous Concrete

Likely ironstone concretion or weathered iron-rich rock

Goethite/hematite-bearing limonite (FeO(OH)·nH₂O / Fe₂O₃)

Iron-rich concretion or weathered ironstone

Goethite–hematite-rich limonite (FeO(OH)·nH₂O / Fe₂O₃)