Anthropogenic (Man Made Industrial Deposit)

Diamond Plate (Steel)

Alloyed Carbon Steel or Aluminum with 'Durbar' pattern

Goldstone (Red/Brown)

Aventurine Glass (SiO2 with Copper inclusions)

Diamond

Carbon (C)

Diamond (Cut and Polished)

Diamond (pure Carbon, C)

Raw Diamond

Carbon (C)

Slag (Industrial Glass Slag)

Amorphous Silica / Ferro-silicate Slag

Blue chalcedony cabochon (probable)

Chalcedony, a cryptocrystalline variety of quartz; silicon dioxide, SiO₂

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Crushed Stone / Gravel

Aggregatus saxum (variable mineral composition)

Sandstone (Red/Brown Variety)

Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)

Red gemstone ring, possibly synthetic ruby or red glass

Unidentified red stone; ruby is corundum (Al₂O₃), but the image cannot confirm its identity

Asphalt (Bituminous Concrete)

Composite material (bitumen binder with mineral aggregate)

Amethyst (with Pyrite and other minerals)

Silicon Dioxide (SiO2)

Diamond (Cut Gemstone)

Natural Carbon (C)

Polished blue stone, likely sodalite or dyed agate

Sodalite: Na₈(Al₆Si₆O₂₄)Cl₂; exact identification requires testing

Asphalt (Bituminous Concrete)

Bituminous Concrete / Pavement

Chert (and Flint)

Silicon Dioxide (SiO2)

Diamond (in a jewelry setting)

Diamond (Carbon, C)

Blue Goldstone

Aventurine Glass (Silicon Dioxide infused with Cobalt/Copper)

Blue calcite sphere

Calcite (CaCO₃), commonly blue-calcite variety

Polished red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Chalk

Calcium Carbonate (CaCO3)

Quartz (Engineered Quartz Surface)

Silicon Dioxide (SiO2) based composite

Iron Slag

Ferrous Slag (Silicate/Oxide mixture)

Flint (chert)

Microcrystalline quartz (SiO₂), commonly called chert or flint

Diamond

C (Native Carbon)

Cullet Glass (Strawberry Glass)

Amorphous Silicon Dioxide (SiO2) with metallic dopants

Tumbled amethyst quartz

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation

Green sea glass or green glass-like tumbled material

Amorphous silicate glass; likely anthropogenic soda-lime glass, not a natural mineral

Fossil or modern bivalve shell

Calcium carbonate shell, likely aragonite (CaCO₃); exact species cannot be determined from the image

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

Industrial vitreous slag; primarily amorphous silicate glass, composition variable

Ferrochrome Slag

Industrial Glassy Slag (Fe-Cr alloy byproduct)

Diamond (Faceted)

Carbon (C)

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)

Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy

Blue Slag Glass

Amorphous Silica (Industrial byproduct)

Desert Rose (also known as Sand Rose)

Gypsum (CaSO4·2H2O) or Barite (BaSO4) with sand inclusions

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Matrix

Tumbled orange calcite

Calcite (CaCO₃)

Man-made Green Quartz (Lab-grown or Treated)

Silicon Dioxide (SiO2) with artificial coloration

Iron Slag

Ferrous Slag (complex silicate and oxide byproduct)

Sandstone

Arenite (SiO2 principal)