Gold nugget
Roasting gold ore to recover the metal
Native gold
Rough diamond
Round cut diamond
Heart shape ruby
Oval amethyst
Pear cut citrine
Round cut peridot
Princess cut citrine
Round cut emerald
Oval cut amethyst
Oval cut emerald
Emerald cut pink sapphire
Round cut amethyst
Radiant cut emerald
Princess cut garnet
Radiant cut pink sapphire
Trillion cut emerald
Trillion cut peridot
Pear cut amethyst
Emerald cut ruby
Oval cut Citrine
Round cut citrine
Oval cut citrine
Oval cut iolite
Round cut tanzanite
Round cut garnet
Heart cut sapphire
Round cut iolite
Pear cut iolite
Square emerald cut citrine
Oval cut peridot
Radiant emerald cut diamond
Emerald cut diamond
Asscher cut diamond
Asscher cut pink sapphire
Asscher cut citrine
Marquise cut diamond
Pear cut diamond
Square princess cut diamond
Heart cut diamond
Pyrite Nodule
Gold in Quartz
Gold Nugget, Stowe Vermont, USA
Silver bars
Gold in quartz
Gold nugget cube
Uncut diamonds
Native silver
Native copper
Cushion cut diamond gemstone
Hematite, England
Pieces of iron ore, close up
Gold ore
Melted gold ore
Pots used for mercury heating
Green mineral
Herkimer diamonds of quartz mineral
Rough diamonds
Native platinum
Rutile in Quartz
Three lumps of gold, close up
Silver bracelet isolated on the white background
Gold products
Brilliant cut diamond gemstones
Brilliant cut diamond gemstone
Mimetite in prismatic crystal form
Pyrite, Colorado
Chalcopyrite, Ely, Vermont, USA
Precious gemstones
Garnet gemstones
Turquoise stones
Gold bar, Kirlian photograph
Assaying copper and lead
Smelting iron ore
Extracting mercury from ore
Heating and distilling mercury
Condensing mercury vapour
Gold core sample
Gold in placer
Amethyst
金塊
Woman bracelet isolated on the white background
Gold in its host rock
Gold embedded in quartz groundmass
Gold bracelet isolated on the white background
Turquoise stone set in gold ring
Oval cut purple sapphire gemstone
Asscher cut diamond gemstone
Heart cut diamond gemstone
Asscher cut diamond gemstones
Pear cut diamond gemstone