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Smithsonian National Museum of Natural History

Quartz Gems

Chip Clark and digitally enhanced by SquareMoose
Specimen Catalog Number Locality Weight
Quartz (var. citrine) NMNH G3640 Brazil, Minas Gerais 781.00 ct
Quartz (var. citrine) NMNH G7721 Brazil, Minas Gerais 636.60 ct
Quartz (var. rock crystal) NMNH G5701 Brazil, Minas Gerais 654.00 ct
Quartz (var. rock crystal) NMNH G4204 Brazil 357.90 ct
Quartz (var. ametrine) NMNH G9576 Bolivia, Santa Cruz 55.68 ct
Quartz (var. citrine) NMNH G2041 Brazil, Minas Gerais 264.75 ct
Quartz NMNH G3592 Brazil, Minas Gerais 374.90 ct
Quartz (var. amethyst) NMNH G9575 Brazil 109.66 ct
Quartz (var. citrine) NMNH G3732 Brazil 277.90 ct
Quartz (var. citrine) NMNH G2269 Brazil 38.88 ct
Quartz NMNH G3420 Brazil, Minas Gerais 48.60 ct
Quartz (var. amethyst) NMNH G1283 United States, Pennsylvania 36.20 ct
Quartz (var. rock crystal) NMNH G3220 99.68 ct
Quartz NMNH G3293 Switzerland 90.00 ct
Quartz (var. amethyst) NMNH G8143 15.87 ct
Quartz (var. vertrine) NMNH G9015 Brazil 59.80 ct
Quartz (var. ametrine) NMNH G9950 Bolivia, Santa Cruz 24.15 ct
Quartz NMNH G3421 Brazil, Minas Gerais 84.00 ct

This assortment of gems exhibits different cutting styles and includes the many varieties of the mineral quartz: amethyst (purple), rose quartz (pink), citrine (gold-orange-yellow), smoky quartz (brown-gray-black), rock crystal (colorless), and ametrine (part amethyst/part citrine - bi-color). The largest gem, the shield-shaped citrine (center top), is 636.55 carats. Most of these quartz gems are from Brazil, however some are from Bolivia (two ametrines), Switzerland (smoky quartz), and the U.S. (octagonal cut amethyst).

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