* Cryptocrystalline quartz (microscopically small crystals) includes agate, carnelian, chalcedony, chrysoprase, fossilized wood, heliotrope, jasper, moss agate, onyx, and sard.
** Macrocrystalline quartz (crystals recognizable with the naked eye) includes amethyst, aventurine, blue quartz, citrine, hawk’s eye, pasiolite, prase, quartz, cat’s eye, rock crystal, rose quartz, smoky quartz, and tiger’s eye.
Citation formats
Gemstone production value in the U.S. 2021, by type
The production value of synthetic diamonds in the United States amounted to ** million U.S. dollars in 2021, making it the most valuable gem type in the North American country based on production. The second-most valuable gem produced in the U.S. that year was moissanite, with a production value amounting to **** million U.S. dollars.
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US Geological Survey. (March 27, 2024). Production value of gemstones in the United States in 2021, by type (in 1,000 U.S. dollars) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 27, 2026, from /statistics/802066/united-states-production-value-gemstones/
US Geological Survey. "Production value of gemstones in the United States in 2021, by type (in 1,000 U.S. dollars)." Chart. March 27, 2024. ÌÇÐÄÆƽâ°æ. Accessed July 27, 2026. /statistics/802066/united-states-production-value-gemstones/
US Geological Survey. (2024). Production value of gemstones in the United States in 2021, by type (in 1,000 U.S. dollars). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 27, 2026. /statistics/802066/united-states-production-value-gemstones/
US Geological Survey. "Production Value of Gemstones in The United States in 2021, by Type (in 1,000 U.S. Dollars)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 27 Mar 2024, /statistics/802066/united-states-production-value-gemstones/
US Geological Survey, Production value of gemstones in the United States in 2021, by type (in 1,000 U.S. dollars) ÌÇÐÄÆƽâ°æ, /statistics/802066/united-states-production-value-gemstones/ (last visited July 27, 2026)
Production value of gemstones in the United States in 2021, by type (in 1,000 U.S. dollars) [Graph], US Geological Survey, March 27, 2024. [Online]. Available: /statistics/802066/united-states-production-value-gemstones/
