Lab-grown diamond market, tracked monthly
Prices, trade and tariffs for laboratory-grown diamonds, built only from U.S., Indian and Chinese government data and updated as each agency publishes.
India export price, polished$67.17
per carat, Aug 2026
−9.0% vs a year earlier
India import price, rough$15.14
per carat, Aug 2026
+29.3% vs a year earlier
U.S. imports, cut lab-grown$24.8M
in the month, Aug 2026
−52.1% vs a year earlier
U.S. duty actually paid10.0%
of import value, Aug 2026
12.8% a year earlier
Polished lab-grown diamonds: India's export price per carat
India ships most of the world's polished lab-grown diamonds. Each candle is one quarter; bars underneath are carats shipped.
Rose in the periodFell in the periodMoving averageCarats exported
Candles are built from monthly averages (open = first month, close = last month). A dashed candle is a quarter still in progress.
Source: India Ministry of Commerce (DGCI&S TRADESTAT)
Show the numbers
| Quarter | Open | High | Low | Close | Carats exported | |
|---|---|---|---|---|---|---|
| 2026-Q3 | $67.85 | $67.85 | $67.17 | $67.17 | 3.71M | in progress |
| 2026-Q2 | $68.98 | $68.98 | $68.91 | $68.93 | 4.48M | |
| 2026-Q1 | $72.42 | $76.08 | $69.58 | $69.58 | 4.08M | |
| 2025-Q4 | $69.57 | $74.02 | $69.57 | $73.24 | 3.72M | |
| 2025-Q3 | $76.77 | $76.77 | $73.82 | $74.33 | 4.29M | |
| 2025-Q2 | $83.86 | $83.86 | $79.01 | $79.01 | 3.21M | |
| 2025-Q1 | $94.68 | $94.68 | $90.18 | $91.73 | 3.58M | |
| 2024-Q4 | $109.41 | $112.74 | $100.81 | $100.81 | 2.78M | |
| 2024-Q3 | $123.36 | $123.36 | $115.45 | $115.45 | 2.57M | |
| 2024-Q2 | $143.02 | $143.02 | $134.52 | $134.52 | 2.26M | |
| 2024-Q1 | $160.36 | $160.36 | $149.50 | $149.50 | 2.38M | |
| 2023-Q4 | $197.52 | $197.52 | $171.44 | $171.44 | 1.76M | |
| 2023-Q3 | $210.68 | $210.68 | $190.82 | $190.82 | 1.77M | |
| 2023-Q2 | $223.33 | $239.37 | $218.53 | $218.53 | 1.09M | |
| 2023-Q1 | $326.17 | $326.17 | $257.67 | $257.67 | 1.29M | |
| 2022-Q4 | $358.12 | $358.12 | $337.12 | $337.12 | 1.17M | |
| 2022-Q3 | $401.96 | $401.96 | $361.57 | $361.57 | 1.28M | |
| 2022-Q2 | $461.88 | $468.15 | $408.91 | $408.91 | 1.12M | |
| 2022-Q1 | $496.77 | $496.77 | $456.34 | $456.34 | 828,108 | |
| 2021-Q4 | $486.71 | $493.68 | $422.71 | $422.71 | 746,110 | |
| 2021-Q3 | $434.35 | $498.44 | $434.35 | $442.01 | 745,253 | |
| 2021-Q2 | $381.46 | $442.97 | $381.46 | $442.97 | 632,144 | |
| 2021-Q1 | $332.07 | $470.77 | $232.65 | $232.65 | 731,056 | |
| 2020-Q4 | $325.88 | $398.73 | $324.08 | $398.73 | 629,456 | |
| 2020-Q3 | $439.88 | $467.88 | $393.85 | $467.88 | 367,313 | |
| 2020-Q2 | $124.22 | $300.24 | $74.79 | $300.24 | 228,424 | |
| 2020-Q1 | $226.26 | $226.26 | $97.75 | $97.75 | 908,813 | |
| 2019-Q4 | $177.26 | $206.60 | $70.13 | $206.60 | 879,419 | |
| 2019-Q3 | $55.81 | $230.04 | $55.81 | $230.04 | 1.34M | |
| 2019-Q2 | $65.36 | $180.56 | $65.36 | $180.56 | 845,991 | |
| 2019-Q1 | $175.74 | $175.74 | $108.06 | $108.06 | 729,519 | |
| 2018-Q4 | $243.91 | $405.00 | $51.05 | $405.00 | 456,005 | |
| 2018-Q3 | $283.44 | $283.44 | $101.67 | $101.67 | 345,597 | |
| 2018-Q2 | $147.77 | $191.71 | $86.72 | $191.71 | 499,249 | |
| 2018-Q1 | $57.54 | $184.06 | $57.54 | $184.06 | 709,360 |
U.S. imports of cut lab-grown diamonds
Value entered each month since the customs code began in January 2022.
Source: U.S. Census Bureau (HTS 7104.91.10)
Show the numbers
| Month | Value | Stones | Duty paid | Duty rate |
|---|---|---|---|---|
| Aug 2026 | $24.8M | 1.54M | $2.5M | 10.0% |
| Jul 2026 | $27.8M | 1.32M | $2.6M | 9.5% |
| Jun 2026 | $18.3M | 1.40M | $1.7M | 9.3% |
| May 2026 | $25.5M | 1.57M | $2.2M | 9.8% |
| Apr 2026 | $19.1M | 1.56M | $1.9M | 9.8% |
| Mar 2026 | $20.3M | 1.14M | $1.9M | 9.2% |
| Feb 2026 | $16.1M | 710,163 | $2.2M | 13.7% |
| Jan 2026 | $5.1M | 446,832 | $1.7M | 32.8% |
| Dec 2025 | $7.1M | 526,511 | $2.7M | 37.4% |
| Nov 2025 | $6.6M | 503,440 | $2.5M | 38.3% |
| Oct 2025 | $8.6M | 1.07M | $3.0M | 34.7% |
| Sep 2025 | $6.2M | 502,970 | $2.4M | 38.4% |
| Aug 2025 | $51.9M | 1.92M | $6.6M | 12.8% |
| Jul 2025 | $67.3M | 2.94M | $6.7M | 10.0% |
| Jun 2025 | $31.8M | 2.49M | $3.1M | 9.9% |
| May 2025 | $35.5M | 2.43M | $3.5M | 9.9% |
| Apr 2025 | $85.3M | 4.31M | $5.5M | 6.6% |
| Mar 2025 | $106.2M | 5.78M | $31K | 0.0% |
| Feb 2025 | $78.2M | 6.41M | $14K | 0.0% |
| Jan 2025 | $65.6M | 5.65M | $8,117 | 0.0% |
| Dec 2024 | $75.4M | 3.63M | $4,016 | 0.0% |
| Nov 2024 | $61.3M | 2.45M | $5,782 | 0.0% |
| Oct 2024 | $107.3M | 7.84M | $13K | 0.0% |
| Sep 2024 | $91.1M | 6.52M | $9,351 | 0.0% |
| Aug 2024 | $75.3M | 5.67M | $7,611 | 0.0% |
| Jul 2024 | $81.1M | 4.97M | $13K | 0.0% |
| Jun 2024 | $69.8M | 2.88M | $7,436 | 0.0% |
| May 2024 | $93.9M | 2.47M | $7,740 | 0.0% |
| Apr 2024 | $83.7M | 3.46M | $18K | 0.0% |
| Mar 2024 | $86.4M | 3.03M | $8,552 | 0.0% |
| Feb 2024 | $94.7M | 3.40M | $1,514 | 0.0% |
| Jan 2024 | $100.9M | 2.55M | $7,321 | 0.0% |
| Dec 2023 | $72.0M | 2.70M | $39K | 0.1% |
| Nov 2023 | $110.2M | 1.90M | $18K | 0.0% |
| Oct 2023 | $131.9M | 2.86M | $38K | 0.0% |
| Sep 2023 | $83.6M | 2.52M | $34K | 0.0% |
| Aug 2023 | $108.5M | 2.30M | $11K | 0.0% |
| Jul 2023 | $95.7M | 3.02M | $34K | 0.0% |
| Jun 2023 | $83.2M | 2.05M | $45K | 0.1% |
| May 2023 | $127.2M | 4.22M | $55K | 0.0% |
| Apr 2023 | $97.2M | 2.74M | $78K | 0.1% |
| Mar 2023 | $106.9M | 3.19M | $100K | 0.1% |
| Feb 2023 | $97.9M | 2.61M | $90K | 0.1% |
| Jan 2023 | $85.5M | 1.78M | $95K | 0.1% |
| Dec 2022 | $84.5M | 1.66M | $107K | 0.1% |
| Nov 2022 | $130.4M | 2.88M | $115K | 0.1% |
| Oct 2022 | $172.7M | 4.54M | $186K | 0.1% |
| Sep 2022 | $146.8M | 3.95M | $135K | 0.1% |
| Aug 2022 | $124.7M | 3.52M | $102K | 0.1% |
| Jul 2022 | $144.8M | 4.51M | $233K | 0.2% |
| Jun 2022 | $154.4M | 3.37M | $124K | 0.1% |
| May 2022 | $139.7M | 2.68M | $163K | 0.1% |
| Apr 2022 | $125.5M | 3.36M | $165K | 0.1% |
| Mar 2022 | $129.8M | 3.01M | $165K | 0.1% |
| Feb 2022 | $123.6M | 2.99M | $86K | 0.1% |
| Jan 2022 | $9.6M | 742,631 | $3,967 | 0.0% |
Rough versus polished, per carat
India's import price for rough stones and export price for polished stones.
Source: India Ministry of Commerce (DGCI&S TRADESTAT)
Show the numbers
| Month | Polished (India exports) | Rough (India imports) |
|---|---|---|
| Aug 2026 | $67.17 | $15.14 |
| Jul 2026 | $67.85 | $16.57 |
| Jun 2026 | $68.93 | $13.41 |
| May 2026 | $68.91 | $13.76 |
| Apr 2026 | $68.98 | $12.94 |
| Mar 2026 | $69.58 | $16.61 |
| Feb 2026 | $76.08 | $16.70 |
| Jan 2026 | $72.42 | $14.67 |
| Dec 2025 | $73.24 | $13.18 |
| Nov 2025 | $74.02 | $12.33 |
| Oct 2025 | $69.57 | $14.09 |
| Sep 2025 | $74.33 | $12.66 |
| Aug 2025 | $73.82 | $11.71 |
| Jul 2025 | $76.77 | $12.44 |
| Jun 2025 | $79.01 | $14.13 |
| May 2025 | $81.20 | $14.96 |
| Apr 2025 | $83.86 | $13.47 |
| Mar 2025 | $91.73 | $13.35 |
| Feb 2025 | $90.18 | $15.72 |
| Jan 2025 | $94.68 | $12.28 |
| Dec 2024 | $100.81 | $13.49 |
| Nov 2024 | $112.74 | $13.49 |
| Oct 2024 | $109.41 | $13.88 |
| Sep 2024 | $115.45 | $12.10 |
| Aug 2024 | $120.26 | $18.00 |
| Jul 2024 | $123.36 | $18.57 |
| Jun 2024 | $134.52 | $23.56 |
| May 2024 | $139.60 | $23.77 |
| Apr 2024 | $143.02 | $30.20 |
| Mar 2024 | $149.50 | $25.10 |
| Feb 2024 | $157.54 | $27.95 |
| Jan 2024 | $160.36 | $27.10 |
| Dec 2023 | $171.44 | $30.58 |
| Nov 2023 | $189.18 | $34.12 |
| Oct 2023 | $197.52 | $37.04 |
| Sep 2023 | $190.82 | $33.58 |
| Aug 2023 | $200.37 | $26.62 |
| Jul 2023 | $210.68 | $25.84 |
| Jun 2023 | $218.53 | $35.27 |
| May 2023 | $239.37 | $35.27 |
| Apr 2023 | $223.33 | $49.64 |
| Mar 2023 | $257.67 | $53.10 |
| Feb 2023 | $284.18 | $51.06 |
| Jan 2023 | $326.17 | $54.33 |
| Dec 2022 | $337.12 | $62.19 |
| Nov 2022 | $344.02 | $68.63 |
| Oct 2022 | $358.12 | $69.16 |
| Sep 2022 | $361.57 | $69.43 |
| Aug 2022 | $374.14 | $79.63 |
| Jul 2022 | $401.96 | $72.22 |
| Jun 2022 | $408.91 | $79.55 |
| May 2022 | $468.15 | $86.35 |
| Apr 2022 | $461.88 | $41.22 |
This month in the data
- India exported 1.97M carats of polished lab-grown diamonds in Aug 2026 at an average $67.17 per carat, 9% below Aug 2025.
- India imported 9.97M carats of rough lab-grown diamonds in Aug 2026 at $15.14 per carat.
- China exported 4.92M carats of rough lab-grown diamonds (two customs codes combined) in Sep 2026 at $9.33 per carat.
- China imported 422,230 carats of polished lab-grown diamonds in Sep 2026 at $97.28 per carat.
- The U.S. imported $24.8M of cut lab-grown diamonds in Aug 2026 (1.54M stones), 52% less than in Aug 2025.
- Duty paid on those imports came to 10.0% of their value.
What's on CaratWatch
- Prices: candlestick charts for polished and rough lab-grown diamonds, U.S. import prices, natural diamonds, the rupee and jewelry price indexes.
- Sourcing: landed cost per carat with freight and duty, a calculator, average stone size and how fast prices fall.
- Selling: when importers stock up, public jewelers' margins and inventory, and the metro areas with the most young single adults.
- U.S. imports: value and stones by month, which countries ship them, ports of entry and importers' states.
- Tariffs: the duty importers actually paid, month by month and by country, with the tariff schedule text.
- World trade: how rough stones move from China through Hong Kong and the UAE to India, and where India's polished stones go.
- U.S. demand: spending on jewelry, the December peak, jewelry stores and marriages by state.
- Natural diamonds: world mine output and lab-grown's share of U.S. cut-diamond imports.
- Naming rules: what the FTC Jewelry Guides say about describing lab-grown diamonds.