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

Dyed Crackle Quartz

Silicon Dioxide (SiO2) with synthetic dye

Goldstone (blue-goldstone–style glass) beads

Artificial aventurine glass, typically silica glass with copper inclusions; not a natural mineral

Dyed Pink Agate

Silicon Dioxide (SiO2) with artificial dye

Dyed or color-enhanced agate/microcrystalline quartz bead

Chalcedony (microcrystalline SiO₂), likely agate

Concrete Fragment

Artificial Conglomerate (Cement and Aggregate)

Possible industrial slag or basaltic volcanic glass

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

Vesicular basalt (weathered lava rock)

Basalt, predominantly plagioclase, clinopyroxene, and iron-magnesium minerals

Tumbled turquoise-colored agate or chalcedony

Cryptocrystalline quartz (SiO₂), possibly dyed chalcedony; exact identification requires testing

Vesicular iron-rich slag or weathered metallic ore

Indeterminate; likely Fe-oxide-bearing slag (magnetite/hematite) rather than a specific natural mineral

Clear quartz crystal point

Quartz (silicon dioxide, SiO₂), likely a polished or cut crystal

Asphalt Concrete

Bituminous Concrete (Anthropic Rock)

Jasper

Microcrystalline Quartz (SiO2)

Possible weathered basalt or slag fragment

Basalt, chiefly plagioclase and pyroxene; identification is uncertain from the image

Blue Quartzite (Dyed)

Metamorphosed Quartz-rich Sandstone (SiO2 with organic dye)

Orange glassy slag (industrial by-product)

Iron-rich silicate glass; composition varies, commonly Fe–Ca–Al silicate

Jasper and Chalcedony Nodule

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Dyed Chalcedony (Agate)

Silicon Dioxide (SiO2) with artificial pigment

Slag Glass (Cullet)

Amorphous Silica (man-made), primarily SiO2 with trace metal oxides

Weathered iron-rich rock, possibly jasper or ironstone

Likely limonite/goethite-bearing siliceous rock; exact identification requires hardness and streak tests

Dyed Agate Geode Slice

Silicon Dioxide (SiO2)

Polished picture jasper slab

Silicified/lithified microcrystalline quartz (chalcedony), commonly with iron-oxide and clay-mineral bands

Green glassy slag (often sold as “sea glass” or “green obsidian”)

Industrial vitreous slag; primarily amorphous silicate glass, composition variable

Picture jasper

Silicified or cherty sedimentary rock, chiefly microcrystalline quartz (SiO₂) with iron-oxide pigments

Dyed Agate

SiO2 (Silicon Dioxide)

Possible weathered metal-rich rock or slag fragment

Uncertain; possibly iron-oxide-rich breccia or industrial slag

Brecciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Blue Agate (Dyed Chalcedony)

Silicon Dioxide (SiO2)

Slag (Industrial Glass)

Anthropogenic Vitreous Slag (Post-industrial byproduct)

Tumbled blue chalcedony (likely blue quartz)

Chalcedony, cryptocrystalline SiO₂; possibly chrysoprase or dyed quartz

Dalmatian Stone (Dalmation Jasper)

Aplite with Arfvedsonite inclusions

Dyed Blue Agate (Dragon Vein Agate)

Silicon Dioxide (SiO2) with artificial cobalt/organic dyes

Tumbled milky chalcedony (likely common opalite-like quartz)

Chalcedony, microcrystalline SiO₂; possibly pale common opal, hydrated SiO₂·nH₂O

Polished blue lace agate slice

Chalcedony (microcrystalline quartz), SiO₂, commonly with blue-gray banding and a druzy quartz center

Tumbled smoky quartz

Quartz (SiO₂), smoky variety

Red jasper (likely iron-oxide-rich jasper)

Microcrystalline quartz (SiO₂) colored by hematite/goethite (Fe₂O₃/FeO(OH))

Amethyst-rich vesicular volcanic rock (probable amethyst basalt/scoria)

Quartz (SiO₂) in vesicular basaltic volcanic rock; precise identification requires testing

Citrine quartz crystal

Quartz, silicon dioxide (SiO₂); yellow variety commonly called citrine

Likely tumbled brown stone

Indeterminate; possibly jasper, chert, or iron-stained quartzite

Peacock Ore

Bornite (Cu5FeS4)

Dyed blue banded agate (tumbled)

Microcrystalline quartz, SiO₂ (chalcedony variety)

Dyed mineral cluster, likely calcite or aragonite

Calcite (CaCO₃) or aragonite (CaCO₃), artificially color-enhanced

Likely weathered basaltic rock or slag-like volcanic specimen

Fine-grained mafic rock, probably basalt; exact identification requires testing