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

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Dyed Agate

Chalcedony (SiO2 with impurities)

Dyed Tumbled Quartz

Silicon Dioxide (SiO2) with artificial pigment

Weathered iron-rich rock fragment

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

Small gray translucent stone, possibly quartz or glassy mineral

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

Dalmatian Stone

Peralkaline Feldsphathic Igneous Rock

Slag

Anthropogenic Vitrification Product / Silicate Slag

Blue Agate (Dyed)

Silicon Dioxide (SiO2)

Unidentified dark, flat specimen

Indeterminate; image resolution is insufficient for mineral identification

Green sea glass (likely bottle glass)

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

Carnelian

Carnelian (Silicon Dioxide - SiO2 with Hematite impurities)

Small metallic-gold mineral fragment, possibly pyrite

Pyrite (FeS₂), if confirmed

Concrete or artificial stone core sample

Artificial conglomerate

Blue Banded Agate (Dyed)

Silicon Dioxide (SiO2) - Chalcedony variety

Red Tiger's Eye

SiO2 (Silicon Dioxide) - Pseudomorph of Quartz after Crocidolite

Pink Dyed Agate

Chalcedony (SiO2) with artificial dyes

Dragon Vein Agate (Dyed/Treated)

Agate (SiO2)

Porphyritic Basalt (likely artificially dyed or altered)

Basalt with plagioclase phenocrysts (likely treated)

Lemon Quartz (Orizaba/Citrinated Quartz)

Silicon Dioxide (SiO2) with iron impurities/treatment

Polished botryoidal jasper/chalcedony (likely ocean jasper)

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

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

Microcrystalline quartz, SiO₂; chalcedony/agate variety

Blue quartz (likely tumbled dyed or coated quartz)

Quartz, silicon dioxide (SiO₂)

Dyed Alum or Dyed Quartz (Ornamental Crystal)

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

Green agate/geode slab

Cryptocrystalline quartz (chalcedony), SiO₂, likely agate with druzy quartz

Carnelian Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Tumbled quartz-rich pebble

Likely quartz-bearing chert or jasper; primarily microcrystalline SiO₂

Blue Obsidian (Cullet Glass)

Silicon Dioxide (Amorphous Glass)

Iridescent bismuth crystal

Bismuth (Bi), commonly laboratory-grown and oxide-coated

Dyed Blue Agate Slice

Silicon Dioxide (SiO2) with artificial dye

Slag

Ferrous Slag (Siliceous industrial waste)

Slag (Industrial By-product)

Glassy silicate or metallic smelting residue

Druzy chalcedony pendant, likely coated or dyed

Microcrystalline quartz (SiO₂), chalcedony with druzy quartz; surface may have titanium or metallic coating

Likely ironstone concretion or weathered iron-rich rock

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

Purple Dyed Agate Geode (Banded Chalcedony)

Silicon Dioxide (SiO2) - variety: Agate

Clear Quartz (Milky Quartz pebble)

Silicon Dioxide (SiO2)

Asphalt Concrete

Bituminous Concrete

Polished black stone, likely black jasper or basalt

Most likely microcrystalline quartz (black jasper/chert), SiO₂; basalt is a plausible alternative

Dyed Agate

SiO2 (Chalcedony/Agate)

Citrine

Silicon Dioxide (SiO2)

Quartz (Citrine variety)

Silicon Dioxide (SiO2)

Tumbled agate/chalcedony pebble

Microcrystalline quartz (SiO₂), likely brown/banded agate or jasper

Blue Agate (Dyed)

Silicon Dioxide (Chalcedony), SiO2