Official data Source: US Census Bureau international trade data
Track this productSynthetic or reconstructed diamonds, worked but not mounted or set
In short
- The US imported $189.1M of this product over the 12 months to August 2026, down 78% on the year before.
- India is the largest supplier, with 93.5% of US imports; Spain is next, with 1.8%.
- Duty paid averaged 10.0% of the value of imports in August 2026, down 2.8 points on a year earlier.
- United Arab Emirates is gaining share: 5.9% over the last 12 months, up from 0.2%.
- US exports were $188.3M over the last 12 months; the largest market is Korea, South, with 39.8%.
US imports, Aug 2026
$25.2M
↓ −52% vs Aug 2025
Last 12 months
$189.1M
↓ −78% vs the 12 months before
Average duty paid
10.0%
↓ −2.8 pts vs Aug 2025
Top supplier
India
93.5% of US imports
US imports by month
The last 13 months, so the same month a year ago is on the left. August 2026 is highlighted. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.
Show the numbers
| Month | US imports |
|---|---|
| August 2025 | $52.2M |
| September 2025 | $6.4M |
| October 2025 | $8.9M |
| November 2025 | $6.7M |
| December 2025 | $7.4M |
| January 2026 | $5.3M |
| February 2026 | $16.3M |
| March 2026 | $20.7M |
| April 2026 | $19.5M |
| May 2026 | $25.9M |
| June 2026 | $18.6M |
| July 2026 | $28.1M |
| August 2026 | $25.2M |
What changed
- US imports were $25.2M in August 2026, down 10% from July 2026 and down 52% from August 2025.
- Over the 12 months to August 2026 they totalled $189.1M, down 78% on the 12 months before.
- Biggest moves in market share since July 2026: Botswana down from 5.3% to 0.0%.
- Duty paid by the main suppliers held within 2 points of July 2026.
US trade by year
US imports were $189.1M in the 12 months to Aug 2026, down 86% on the 12 months to Aug 2023. US exports were $188.3M, down 40%. This code began with the HS 2022 revision in January 2022, taking goods from 7104.90, so its history starts there. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.
Show the numbers
| Period | US imports |
|---|---|
| 12 months to Aug 2023 | $1.34B |
| 12 months to Aug 2024 | $1.09B |
| 12 months to Aug 2025 | $861.1M |
| 12 months to Aug 2026 | $189.1M |
- India
- United Arab Emirates
- Thailand
- Canada
- All countries
Show the numbers
| Period | India | United Arab Emirates | Thailand | Canada |
|---|---|---|---|---|
| 12 months to Aug 2023 | 93.2% | 0.2% | 0.2% | 0.3% |
| 12 months to Aug 2024 | 94.1% | 0.3% | 0.7% | 0.4% |
| 12 months to Aug 2025 | 91.7% | 0.2% | 5.4% | 0.6% |
| 12 months to Aug 2026 | 87.0% | 5.9% | 1.9% | 1.2% |
Show the numbers
| Period | India | United Arab Emirates | Thailand | Canada | All countries |
|---|---|---|---|---|---|
| 12 months to Aug 2023 | 0.0% | 0.0% | 0.1% | 0.2% | 0.1% |
| 12 months to Aug 2024 | 0.0% | 0.1% | 0.0% | 0.1% | 0.0% |
| 12 months to Aug 2025 | 3.1% | 6.6% | 0.3% | 0.7% | 2.9% |
| 12 months to Aug 2026 | 15.7% | 9.0% | 17.0% | 2.1% | 15.0% |
| Period | US imports | Duty paid | US exports |
|---|---|---|---|
| 12 months to Aug 2026 | $189.1M−78% | 15.0%+12.1 pts | $188.3M+39% |
| 12 months to Aug 2025 | $861.1M−21% | 2.9%+2.9 pts | $135.6M−45% |
| 12 months to Aug 2024 | $1.09B−19% | 0.0%−0.1 pts | $248.6M−21% |
| 12 months to Aug 2023 | $1.34B | 0.1% | $315.7M |
Who supplies the US
August 2026. Small figures under each value are the change from August 2025. Average prices aren't shown because this product's lines are counted in different units.
| Country | US imports | Share | Average price | Duty paid | Last 13 months |
|---|---|---|---|---|---|
| India | $23.6M | 93.5%−5.2 pts | n/a | 10.0%−2.8 pts | |
| Spain | $446K | 1.8%+1.7 pts | n/a | 10.0%−5.0 pts | |
| Belgium | $250K | 1.0%+1.0 pts | n/a | 3.1%−11.9 pts | |
| United Arab Emirates | $245K | 1.0%+0.9 pts | n/a | 12.5%+2.5 pts | |
| Israel | $223K | 0.9%+0.8 pts | n/a | 12.5%−1.1 pts | |
| Thailand | $165K | 0.7%+0.6 pts | n/a | 13.5%−6.9 pts | |
| Mexico | $90K | 0.4%new | n/a | 0.0% | |
| Germany | $58K | 0.2%+0.1 pts | n/a | 10.0%−5.0 pts | |
| Other countries (8) | $173K | 0.7%−0.1 pts | n/a | 12.6%+4.3 pts | |
| All countries | $25.2M | 100.0% | n/a | 10.0%−2.8 pts |
The 3 largest suppliers had 94.8% of US imports over the last 12 months.
How the market is shifting
United Arab Emirates gained the most share: 5.9% of US imports over the last 12 months, up from 0.2% in the 12 months before. India lost the most: 87.0%, down from 91.7%. The charts show September 2024 to August 2026 for the 4 largest suppliers over the last 12 months. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.
- India
- United Arab Emirates
- Thailand
- Canada
- All countries
Show the numbers
| Month | India | United Arab Emirates | Thailand | Canada |
|---|---|---|---|---|
| September 2024 | 86.5% | 0.0% | 7.5% | 1.1% |
| October 2024 | 89.3% | 0.5% | 6.1% | 0.4% |
| November 2024 | 82.9% | 0.3% | 12.8% | 1.3% |
| December 2024 | 96.9% | 0.0% | 0.9% | 0.6% |
| January 2025 | 96.9% | 0.0% | 0.1% | 0.4% |
| February 2025 | 86.8% | 0.0% | 11.1% | 0.1% |
| March 2025 | 92.4% | 0.0% | 6.1% | 0.3% |
| April 2025 | 90.2% | 0.1% | 8.5% | 0.1% |
| May 2025 | 96.8% | 0.0% | 0.3% | 1.3% |
| June 2025 | 97.2% | 0.0% | 0.1% | 1.5% |
| July 2025 | 95.7% | 1.2% | 1.9% | 0.5% |
| August 2025 | 98.6% | 0.1% | 0.0% | 0.4% |
| September 2025 | 69.3% | 20.1% | 0.4% | 3.2% |
| October 2025 | 61.1% | 16.9% | 12.1% | 1.7% |
| November 2025 | 68.3% | 13.4% | 8.1% | 4.2% |
| December 2025 | 65.3% | 14.7% | 9.3% | 3.6% |
| January 2026 | 55.4% | 30.1% | 5.5% | 2.9% |
| February 2026 | 81.6% | 13.4% | 0.6% | 0.8% |
| March 2026 | 94.6% | 2.0% | 0.6% | 0.8% |
| April 2026 | 93.9% | 0.5% | 1.2% | 1.9% |
| May 2026 | 96.6% | 0.6% | 0.7% | 1.3% |
| June 2026 | 89.5% | 6.9% | 0.7% | 0.7% |
| July 2026 | 91.8% | 1.5% | 0.2% | 0.1% |
| August 2026 | 93.5% | 1.0% | 0.7% | 0.1% |
Show the numbers
| Month | India | United Arab Emirates | Thailand | Canada | All countries |
|---|---|---|---|---|---|
| September 2024 | 0.0% | 0.0% | 0.0% | 0.1% | 0.0% |
| October 2024 | 0.0% | 0.2% | 0.0% | 0.0% | 0.0% |
| November 2024 | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
| December 2024 | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
| January 2025 | 0.0% | 0.0% | 1.5% | 0.0% | 0.1% |
| February 2025 | 0.0% | 0.0% | 0.0% | 0.6% | 0.0% |
| March 2025 | 0.0% | n/a | 0.0% | 1.8% | 0.1% |
| April 2025 | 7.2% | 8.1% | 0.3% | 4.8% | 6.6% |
| May 2025 | 10.0% | n/a | 11.0% | 2.2% | 10.0% |
| June 2025 | 10.0% | n/a | 15.8% | 1.3% | 9.9% |
| July 2025 | 10.0% | 10.0% | 10.0% | 1.0% | 10.0% |
| August 2025 | 12.8% | 10.0% | 20.5% | 0.8% | 12.8% |
| September 2025 | 50.0% | 10.0% | 19.0% | 1.8% | 37.7% |
| October 2025 | 47.2% | 10.0% | 19.0% | 2.2% | 34.4% |
| November 2025 | 50.0% | 10.0% | 19.1% | 0.5% | 38.2% |
| December 2025 | 49.8% | 10.0% | 19.0% | 7.2% | 37.2% |
| January 2026 | 50.2% | 10.0% | 19.3% | 3.2% | 33.0% |
| February 2026 | 14.5% | 10.0% | 18.6% | 2.5% | 13.8% |
| March 2026 | 9.4% | 10.0% | 10.0% | 2.0% | 9.4% |
| April 2026 | 10.1% | 10.0% | 10.3% | 0.2% | 9.9% |
| May 2026 | 10.0% | 10.0% | 10.6% | 0.4% | 9.9% |
| June 2026 | 10.0% | 0.6% | 10.1% | 2.8% | 9.4% |
| July 2026 | 10.0% | 10.5% | 11.9% | 7.6% | 9.6% |
| August 2026 | 10.0% | 12.5% | 13.5% | 0.0% | 10.0% |
Tariff actions touching this product
When the duty paid on this product changed and stayed changed, for its main suppliers and all countries, newest first, with the Federal Register notices that named the product in the 3 months before. Rates are medians of the 4 months either side, less any usual seasonal swing. A change shows what happened to duty paid, not why; read each notice for what it did.
- February–March 2026 · Duty paid: India 49.9% → 10.0%, all countries 35.7% → 9.9%.
- September 2025 · Duty paid: India 10.0% → 49.9%, all countries 10.0% → 37.4%.
- April 2025 · Duty paid: India 0.0% → 10.0%, all countries 0.1% → 10.0%.
Where it enters the US
Main ports of entry over the 12 months to August 2026: US imports and share.
Where US exports go
US exports were $84.2M in August 2026, up 1822% from August 2025, and $188.3M over the last 12 months, up 39% on the 12 months before. Fastest-growing market with 3% or more of US exports: Korea, South, up 14493%.
| Market | Last 12 months | Share | vs 12 months before |
|---|---|---|---|
| Korea, South | $75.0M | 39.8% | +14493% |
| Hong Kong | $55.3M | 29.4% | +127% |
| India | $18.3M | 9.7% | −44% |
| United Arab Emirates | $13.5M | 7.2% | −32% |
| Mexico | $8.8M | 4.7% | +129% |
| Canada | $7.0M | 3.7% | −59% |
| Thailand | $3.1M | 1.7% | −64% |
| United Kingdom | $1.9M | 1.0% | −22% |
| Other countries (41) | $5.3M | 2.8% | −79% |
| All countries | $188.3M | 100.0% | +39% |
Markets abroad
Each country's own import figures for this product, from UN Comtrade: the 8 biggest importers outside the US in the latest year each has reported, what they bought from the US, and the change from the year before. Values usually include freight and insurance to the importer's border, so they run a little above US export figures. Countries report a year or more late; 84 have reported 2025 so far. Where a country's figure for imports from the US is under half or over double what the US recorded exporting there that year, the US figure is shown under it.
| Market | Imports | vs year before | From the US | US share |
|---|---|---|---|---|
| Hong Kong | $364.8Min 2025 | +32% | $55.7M | 15.3% |
| China | $251.7Min 2025 | +35% | $15.5M | 6.1% |
| India | $121.3Min 2025 | −34% | $32.2M | 26.6% |
| Thailand | $65.4Min 2025 | +5.9% | $2.4M | 3.6% |
| Israel | $48.1Min 2025 | +11% | $4.2M | 8.8% |
| United Kingdom | $40.4Min 2025 | −0.9% | $3.9M | 9.7% |
| Korea, South | $34.4Min 2025 | +7.4% | $566K | 1.6% |
| Canada | $33.5Min 2025 | +2.8% | $2.7MUS records $12.2M | 8.0% |
The biggest market outside the US is Hong Kong, which imported $364.8M of this product in 2025, 15.3% of that from the US.
The US supplies 26.6% of imports into India, but under 10% into China, Thailand and Israel.
Of these, imports into China grew fastest: up 35% from 2024 to 2025.
Related products
Other products under heading 7104: synthetic or reconstructed precious or semiprecious stones, not strung, mounted or set (including ungraded stones temporarily strung for transport). US trade over the 12 months to August 2026.
| Product | US imports | US exports |
|---|---|---|
| Synthetic or reconstructed diamonds, unworked or simply sawn or roughly shapedHS 7104.21 | $4.5M | $179.9M |
| Piezo-electric quartz, not mounted or setHS 7104.10 | $10.7M | $31.6M |
| Synthetic or reconstructed precious or semiprecious stones, worked but not mounted or set, not elsewhere specifiedHS 7104.99 | $25.2M | $8.0M |
| Synthetic or reconstructed precious or semiprecious stones, unworked or simply sawn or roughly shaped, not elsewhere specifiedHS 7104.29 | $654K | $3.2M |
About these figures
- Source: US Census Bureau international trade data, not seasonally adjusted, in US dollars. Retrieved November 3, 2026.
- US imports are general imports at customs value, which excludes freight and insurance. Exports are at free-alongside-ship value.
- Average price is customs value divided by quantity, across all of the product's 10-digit lines.
- Duty paid is the duty Census calculates on each country's imports for consumption, as a share of their value. It moves with tariff changes, exemptions and the mix of goods within the product.
- Markets abroad are each country's imports as it reports them to UN Comtrade, in US dollars, usually including freight and insurance. Countries report a year or more late and in their own edition of the HS codes, so one still on an older edition is missing for codes that changed in 2022.
- Census revises recent months, so figures can change slightly. These are estimates for research and planning, not customs or legal advice.