In 2021, the volume of rough or uncut diamonds that were imported to the United States amounted to approximately 857,000 carats, while U.S. imports of cut but unset diamonds amounted to over 12.3 million carats. U.S. imports of cut but unset sapphires amounted to 2.31 million carats that year.
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US Geological Survey. (March 27, 2024). Import volume of gemstones to the United States in 2021, by variety (in 1,000 carats) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 24, 2026, from /statistics/802111/united-states-gemstones-import-volume/
US Geological Survey. "Import volume of gemstones to the United States in 2021, by variety (in 1,000 carats)." Chart. March 27, 2024. ÌÇÐÄÆƽâ°æ. Accessed July 24, 2026. /statistics/802111/united-states-gemstones-import-volume/
US Geological Survey. (2024). Import volume of gemstones to the United States in 2021, by variety (in 1,000 carats). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 24, 2026. /statistics/802111/united-states-gemstones-import-volume/
US Geological Survey. "Import Volume of Gemstones to The United States in 2021, by Variety (in 1,000 Carats)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 27 Mar 2024, /statistics/802111/united-states-gemstones-import-volume/
US Geological Survey, Import volume of gemstones to the United States in 2021, by variety (in 1,000 carats) ÌÇÐÄÆƽâ°æ, /statistics/802111/united-states-gemstones-import-volume/ (last visited July 24, 2026)
Import volume of gemstones to the United States in 2021, by variety (in 1,000 carats) [Graph], US Geological Survey, March 27, 2024. [Online]. Available: /statistics/802111/united-states-gemstones-import-volume/
