Charcoal
Lightweight black carbon residue.
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Charcoal
Lightweight black carbon residue.
Fossil fuel
Fuel formed naturally from dead plants and animals.
Gypsum
Soft calcium sulfate mineral.

Cubic zirconia
Cubic crystalline form of zirconium dioxide.
Jet (gemstone)
Mineraloid and minor gemstone.
Prasiolite
Quartz variety.
Isotopes of phosphorus
Stones of India
Commercial stone industry.
Senegalite
Mineral.
Volynskite
Telluride mineral.
Quartz fiber dosimeter
Type of radiation dosimeter.

Wodginite
Mineral.

Zoisite
Sorosilicate mineral.
Ferrotitanium
Alloy of titanium and iron.
Argentite
Sulfide mineral.
Quartz monzonite
Type of igneous rock.
Bird's eye extinction
Bayldonite
Secondary mineral.
Orichalcum
Mythological metal.
Tourmaline
Cyclosilicate mineral group.

Sperrylite
Platinum arsenide mineral.
Cooperite (mineral)
Sulfide mineral.
Bromargyrite
Natural mineral form of silver bromide.