Synthetic (Man Made Material Mimicking Natural Stone)

Slag Glass

SiO2 (Silicon Dioxide) with impurities

Dalmatian Stone

Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)

Cobalt Glass Slug (Man-made Glass)

Amorphous Silica with Cobalt Oxide (SiO2 + CoO)

River Pebble / Chert Pebble

Microcrystalline Quartz (SiO2)

Red Sandstone or Brick Fragment

Arenite (if sandstone)

Aura Quartz (Pink/Rose Aura Quartz)

Silicon Dioxide (SiO2) bonded with Platinum and/or Silver

Synthetic Sapphire and Ion-X Glass

Single-crystal Alumina (Al2O3) and Ion-strengthened Aluminosilicate Glass

Ferrous Slag

Iron/Steel Slag (Complex Calcium-Alumino-Silicates)

Sea Glass

Amorphous Silicon Dioxide (Man-made glass weathered by nature)

Quartz Geode (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Ruby (in costume jewelry context)

Corundum (Al2O3) with Chromium impurities

Emerald

Beryl, Be₃Al₂(SiO₃)₆, colored green mainly by chromium and/or vanadium

Rainbow Hematite (Man-made/Treated)

Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)

Goldstone (aventurine glass)

Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone

Man-made earbud charging case (Not a rock or mineral)

Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components

Polished black stone, likely black obsidian

Obsidian (volcanic glass), chiefly silica-rich rhyolitic composition

Diamond

Carbon (C)

Composite Turquoise or Reconstituted Turquoise with Copper inclusions

CuAl6(PO4)4(OH)8·4H2O (Turquoise) mixed with matrix and copper/bronze flakes

Blue-green turquoise (probable)

Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Titanium Aura Quartz (Aura Quartz)

Titanium-coated Silicon Dioxide (SiO2)

Aventurine

Quartz containing inclusions of Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Asphalt aggregate (crushed stone in bitumen)

Artificial composite; predominantly crushed granite, basalt, limestone, and/or recycled aggregate bound by bitumen

Ferro-silicate Slag

Industrial Vitrified Slag (High-silica amorphous glass)

Coquina

Bioclastic Limestone (Coquina)

Sea Glass

Man-made vitreous material (silica-based glass)

Chert

Microcrystalline Quartz (SiO2)

Engineered Quartz (Quartzite look-alike)

Silicon Dioxide (SiO2) composite

K2 Stone (or K2 Jasper)

Azurite-in-Granite (Potassium Feldspar, Quartz, Plagioclase, Muscovite, and Azurite)

Diamond (or Diamond Simulant)

Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia - ZrO2, Moissanite - SiC)

Blue Slag Glass

Man-made Silicon Dioxide (Amorphous)

Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)

Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)

Chalcanthite (Likely Synthetic/Lab-Grown)

Hydrated copper(II) sulfate (CuSO4·5H2O)

Green glassy cabochon, likely dyed or synthetic material

Uncertain; possibly green obsidian, chrysoprase, or synthetic glass

Sandstone

Arenite (SiO2 primarily)

Goldstone (blue-goldstone–style glass) beads

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

Synthetic Costume Accessory (Non-Geological)

Polyester and Acrylic Fiber (Anthropogenic polymer)

Diamond (in jewelry)

Cubic Carbon (C)

Ruby in Matrix

Corundum (Al2O3)

Sandstone

Arenite (variable SiO2 composition)

Diamond (Faceted Gemstone)

Native Carbon (C)

Iron Slag (Industrial Byproduct)

Anthropogenic Vitrification Product/Ferrous Slag