Tariffs on lab-grown diamonds
The regular U.S. duty on cut lab-grown diamonds for jewelry is free, but additional duties under Chapter 99 apply to many countries. The chart shows what importers actually paid: calculated duty divided by the value entered for consumption, as reported to Customs.
Duty paid as a share of value, by month
The highest month so far was Sep 2025 at 38.4%.
Source: U.S. Census Bureau (calculated duty and imports for consumption, HTS 7104.91.10)
Show the numbers
| Month | Duty paid | Value entered | Rate |
|---|---|---|---|
| Aug 2026 | $2.5M | $24.8M | 10.0% |
| Jul 2026 | $2.6M | $27.8M | 9.5% |
| Jun 2026 | $1.7M | $18.2M | 9.3% |
| May 2026 | $2.2M | $22.6M | 9.8% |
| Apr 2026 | $1.9M | $19.1M | 9.8% |
| Mar 2026 | $1.9M | $20.3M | 9.2% |
| Feb 2026 | $2.2M | $16.1M | 13.7% |
| Jan 2026 | $1.7M | $5.1M | 32.8% |
| Dec 2025 | $2.7M | $7.1M | 37.4% |
| Nov 2025 | $2.5M | $6.6M | 38.3% |
| Oct 2025 | $3.0M | $8.6M | 34.7% |
| Sep 2025 | $2.4M | $6.2M | 38.4% |
| Aug 2025 | $6.6M | $51.9M | 12.8% |
| Jul 2025 | $6.7M | $67.3M | 10.0% |
| Jun 2025 | $3.1M | $31.8M | 9.9% |
| May 2025 | $3.5M | $35.5M | 9.9% |
| Apr 2025 | $5.5M | $83.3M | 6.6% |
| Mar 2025 | $31K | $102.9M | 0.0% |
| Feb 2025 | $14K | $82.4M | 0.0% |
| Jan 2025 | $8,117 | $71.5M | 0.0% |
| Dec 2024 | $4,016 | $73.6M | 0.0% |
| Nov 2024 | $5,782 | $67.3M | 0.0% |
| Oct 2024 | $13K | $120.8M | 0.0% |
| Sep 2024 | $9,351 | $92.1M | 0.0% |
| Aug 2024 | $7,611 | $79.1M | 0.0% |
| Jul 2024 | $13K | $91.5M | 0.0% |
| Jun 2024 | $7,436 | $67.8M | 0.0% |
| May 2024 | $7,740 | $104.1M | 0.0% |
| Apr 2024 | $18K | $90.2M | 0.0% |
| Mar 2024 | $8,552 | $90.4M | 0.0% |
| Feb 2024 | $1,514 | $99.5M | 0.0% |
| Jan 2024 | $7,321 | $112.5M | 0.0% |
| Dec 2023 | $39K | $75.0M | 0.1% |
| Nov 2023 | $18K | $107.4M | 0.0% |
| Oct 2023 | $38K | $147.6M | 0.0% |
| Sep 2023 | $34K | $106.2M | 0.0% |
| Aug 2023 | $11K | $121.9M | 0.0% |
| Jul 2023 | $34K | $93.2M | 0.0% |
| Jun 2023 | $45K | $86.4M | 0.1% |
| May 2023 | $55K | $157.3M | 0.0% |
| Apr 2023 | $78K | $107.1M | 0.1% |
| Mar 2023 | $100K | $107.2M | 0.1% |
| Feb 2023 | $90K | $101.6M | 0.1% |
| Jan 2023 | $95K | $112.0M | 0.1% |
Duty paid by supplying country, 2026
January to Aug 2026, ten largest suppliers by value.
Source: U.S. Census Bureau
Show the numbers
| Country | Imports | Rate |
|---|---|---|
| India | $143.8M | 11.1% |
| United Arab Emirates | $6.4M | 8.2% |
| Botswana | $1.5M | 0.0% |
| Canada | $1.3M | 1.3% |
| Thailand | $1.2M | 13.1% |
| Israel | $1.1M | 12.2% |
| Spain | $446K | 10.0% |
| Hong Kong | $352K | 10.9% |
| China | $247K | 23.4% |
| Germany | $230K | 10.8% |
What the tariff schedule says
Text and rates as published in the Harmonized Tariff Schedule of the United States. This is a record, not legal or customs advice; a licensed customs broker can confirm what applies to a shipment.
| Heading | Description | Rate |
|---|---|---|
| 7104.21.00.00 | Diamonds | 3% |
| 7104.91.10.00 | Cut but not set, and suitable for use in the manufacture of jewelry | Free |
| 7104.91.50.00 | Other | 6.4% |
| 9903.01.84 | Except for products described in headings 9903.01.85-9903.01.89, articles the product of India that are entered for consumption, or withdrawn from warehouse for consumption, after 12:01 a.m. eastern daylight time on August 27, 2025, as provided for in subdivision (z) of U.S. note 2 to this subchapter [Compiler's note: provision terminated as of February 7, 2026.] | The duty provided in the applicable subheading + 25% |
| 9903.02.26 | Except for goods loaded onto a vessel at the port of loading and in transit on the final mode of transit before 12:01 a.m. eastern daylight time on August 7, 2025, and entered for consumption or withdrawn from warehouse for consumption before 12:01 a.m. eastern daylight time on October 5, 2025, except for products described in headings 9903.01.30-9903.01.33 and 9903.02.78, and except as provided for in headings 9903.01.34 and 9903.02.01, articles the product of India, as provided for in subdivision (v) of U.S. note 2 to this subchapter | The duty provided in the applicable subheading + 25% |
| 9903.05.44 | Except for products described in headings 9903.05.85–9903.05.92, articles the product of India, as provided for in U.S. note 52 to this subchapter | The duty provided in the applicable subheading + 10% |
Source: U.S. International Trade Commission, Harmonized Tariff Schedule