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Smithsonian National Museum of Natural History

Quartz Gems

Photograph of a large group of faceted quartz gems from the National Gem Collection
Photo by Chip Clark. Click to zoom.
SpecimenCatalog NumberLocalityWeight
Quartz (var. citrine)NMNH G3640-00Minas Gerais, Brazil781 ct
Quartz (var. citrine)NMNH G7721-00Minas Gerais, Brazil636.6 ct
Quartz (var. rock crystal)NMNH G5701-00Minas Gerais, Brazil654 ct
Quartz (var. rock crystal)NMNH G4204-00Brazil357.9 ct
Quartz (var. ametrine)NMNH G9576-00Anahi Mine, Santa Cruz, Bolivia55.68 ct
Quartz (var. citrine)NMNH G2041-00Minas Gerais, Brazil264.75 ct
QuartzNMNH G3592-00Minas Gerais, Brazil374.9 ct
Quartz (var. amethyst)NMNH G9575-00Brazil109.66 ct
Quartz (var. citrine)NMNH G3732-00Brazil277.9 ct
Quartz (var. citrine)NMNH G2269-00Brazil38.88 ct
QuartzNMNH G3420-00Minas Gerais, Brazil48.6 ct
Quartz (var. amethyst)NMNH G1283-00Pennsylvania, United States36.2 ct
Quartz (var. rock crystal)NMNH G3220-00Synthetic99.68 ct
QuartzNMNH G3293-00Switzerland90 ct
Quartz (var. amethyst)NMNH G8143-0015.87 ct
Quartz (var. vertrine)NMNH G9015-00Brazil59.8 ct
Quartz (var. ametrine)NMNH G9950-00Anahi Mine, Santa Cruz, Bolivia24.15 ct
QuartzNMNH G3421-00Minas Gerais, Brazil84 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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