Goldstone (Red/Brown)
Aventurine Glass (SiO2 with Copper inclusions)
Category
Browse man made glass (not a natural rock or mineral) specimens identified by the Rock Identifier community.
Goldstone (Red/Brown)
Aventurine Glass (SiO2 with Copper inclusions)
Titanium Coated Kyanite (Aura Kyanite)
Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating
Dzi Bead (Etched Chalcedony)
Cryptocrystalline Quartz (SiO2) with chemical etching
Cubic Zirconia (Jewelry Setting)
Cubic Zirconia (ZrO2)
Cubic Zirconia (Man-made)
Cubic Zirconia (ZrO2) with Enamel and Metal Alloy
Note: This is a Man-Made Object (Costume/Prop Patch)
Synthetic fiber and pigments (Cellulose/Plastic-based composite)
Slag Glass
Amorphous Silicate (Man-made)
Rainbow Hematite (Titanium Coated)
Iron(III) oxide (Fe2O3) with Titanium/Metal Oxide coating
Polished dendritic agate or jasper
Microcrystalline quartz (SiO₂), likely chalcedony with iron/manganese dendrites
Goldstone (Brown)
Aventurine glass
Iron Slag (Industrial Byproduct)
Anthropogenic Vitrification Product/Ferrous Slag
Metal Chain Belt with Square Plates
Not applicable (man-made)
Black beaded bracelet, likely black onyx or glass
Possibly chalcedony (microcrystalline quartz, SiO₂); the beads may instead be man-made glass
Cullet Glass (Man-made Glass Slag)
Amorphous Silica (SiO2) with chemical additives
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
Blue Goldstone
Man-made glass with crystalline copper/cobalt inclusions
Blue-green cabochon, likely chalcedony or treated glass imitation
Cryptocrystalline quartz (chalcedony/possibly chrysoprase); identification uncertain from image
Porcelain (White Ceramic)
Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)
Likely beach-worn glass and a pebble
The brown piece appears to be weathered glass (amorphous SiO₂-rich material); the pale piece is likely a small quartz-rich stone, possibly milky quartz.
Sandstone Concretion
Siliciclastic Concretion
Green Quartz / Chrysoprase / Sea Glass
Silicon Dioxide (SiO2)
Blue Cracked Quartz (Dyed Fire Crackle Quartz)
Silicon Dioxide (SiO2) with synthetic dye
Aqua Aura Quartz
Silicon Dioxide (SiO2) bonded with Gold (Au)
Dyed Crackle Quartz (Green)
Quenching-treated Quartz (Silicon Dioxide, SiO2)
Slag Glass (Leland Blue variant)
Anthropogenic Vitreous Silicate
Blue glassy mineral specimen, possibly dyed or synthetic
Uncertain; possible blue fluorite (CaF₂), dyed chalcedony, or man-made glass
Slag
Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)
Dalmatian Stone
Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)
Synthetic Resin / Plastic Figurine
Synthetic Polymer (Copolymer of Polyethylene or Resin)
Blue Slag Glass
Anthropogenic Amorphous Silicon Dioxide
Tektite
Natural impact glass
Goldstone
Man-made glass with copper inclusions
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Sea Glass
Man-made vitreous material (silica-based glass)
Cubic Zirconia (Simulated Diamond)
Cubic Zirconia (ZrO2)
Metal Alloy (Likely Pewter or Sterling Silver)
Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).
Likely tumbled red mineral or glass imitation
Indeterminate; possibilities include red jasper (microcrystalline quartz, SiO₂) or dyed chalcedony
N/A - Man-made object (Jewelry Chain)
Antiqued or Oxidized Metal Chain (often Steel or Brass)
Opalite
Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)
Rainbow Hematite (Man-made/Treated)
Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)
Tumbled milky quartz
Quartz, silicon dioxide (SiO₂)
Tumbled sea glass or pale-green quartz pebble
Indeterminate from image; possibly quartz (SiO₂), but the smooth translucent piece may be man-made glass