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Official data Source: US Census Bureau international trade data Data through August 2026 · updated monthly

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HS 2508.50

Andalusite, kyanite and sillimanite, whether or not calcined

In short

  • The US imported $1.8M of this product over the 12 months to August 2026, down 3.5% on the year before.
  • Peru is the largest supplier, with 50.0% of US imports; France is next, with 25.2%.
  • France is the cheapest main supplier before and after freight and duty, landing at $455.72/tonne.
  • Duty paid averaged 11.9% of the value of imports in August 2026, up 6.3 points on a year earlier.
  • Peru is gaining share: 29.0% over the last 12 months, up from 22.9%.
  • US exports were $18.4M over the last 12 months; the largest market is Germany, with 18.8%.

US imports, Aug 2026

$106K

↑ +4.2% vs Aug 2025

Last 12 months

$1.8M

↓ −3.5% vs the 12 months before

Average duty paid

11.9%

↑ +6.3 pts vs Aug 2025

Top supplier

Peru

50.0% 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.

Aug2025SepOctNovDecJan2026FebMarAprMayJunJulAug
Show the numbers
MonthUS imports
August 2025$102K
September 2025$11K
October 2025$127K
November 2025$38K
December 2025$22K
January 2026$79K
February 2026$82K
March 2026$187K
April 2026$137K
May 2026$92K
June 2026$760K
July 2026$120K
August 2026$106K

What changed

  • US imports were $106K in August 2026, down 11% from July 2026 and up 4.2% from August 2025.
  • Over the 12 months to August 2026 they totalled $1.8M, down 3.5% on the 12 months before.
  • Biggest moves in market share since July 2026: Peru up from 33.4% to 50.0%, South Africa down from 39.2% to 24.8%.
  • Average price from France rose 217% since July 2026, to $702.24/tonne.
  • Duty paid on imports from France rose from 4.1% to 10.0% of their value since July 2026.
  • Duty paid on imports from Peru rose from 10.0% to 12.5% of their value since July 2026.

US trade by year

US imports were $1.8M in the 12 months to Aug 2026, down 14% on the 12 months to Aug 2017. US exports were $18.4M, up 29%.

2017201820192020202120222023202420252026
Show the numbers
PeriodUS imports
12 months to Aug 2017$2.0M
12 months to Aug 2018$1.9M
12 months to Aug 2019$2.9M
12 months to Aug 2020$478K
12 months to Aug 2021$501K
12 months to Aug 2022$2.9M
12 months to Aug 2023$1.8M
12 months to Aug 2024$3.4M
12 months to Aug 2025$1.8M
12 months to Aug 2026$1.8M
  • South Africa
  • Peru
  • France
  • United Kingdom
  • All countries
Share of US imports
Show the numbers
PeriodSouth AfricaPeruFranceUnited Kingdom
12 months to Aug 201776.9%11.1%7.3%1.4%
12 months to Aug 201860.8%27.2%9.6%1.2%
12 months to Aug 201982.5%3.2%10.0%4.0%
12 months to Aug 20205.9%22.5%60.3%10.5%
12 months to Aug 202119.8%3.3%59.1%17.7%
12 months to Aug 202234.5%57.1%3.7%4.3%
12 months to Aug 202359.7%13.0%24.3%3.1%
12 months to Aug 202480.7%10.6%6.7%2.0%
12 months to Aug 202558.0%22.9%14.2%4.4%
12 months to Aug 202653.6%29.0%16.0%1.4%
Duty paid, % of value
Show the numbers
PeriodSouth AfricaPeruFranceUnited KingdomAll countries
12 months to Aug 20170.0%0.0%0.0%0.0%0.0%
12 months to Aug 20180.0%0.0%0.0%0.0%0.0%
12 months to Aug 20190.0%0.0%0.0%0.0%0.0%
12 months to Aug 20200.0%0.0%0.0%0.0%0.0%
12 months to Aug 20210.0%0.0%0.0%0.0%0.0%
12 months to Aug 20220.0%0.0%0.0%0.0%0.0%
12 months to Aug 20230.0%0.0%0.0%0.0%0.0%
12 months to Aug 20240.0%0.0%0.0%0.0%0.0%
12 months to Aug 20250.6%1.9%3.8%2.6%1.4%
12 months to Aug 202611.1%9.6%9.3%10.0%10.4%
PeriodUS importsDuty paidUS exports
12 months to Aug 2026$1.8M−3.5%10.4%+9.0 pts$18.4M−2.6%
12 months to Aug 2025$1.8M−47%1.4%+1.4 pts$18.9M+0.8%
12 months to Aug 2024$3.4M+86%0.0%0.0 pts$18.7M−6.1%
12 months to Aug 2023$1.8M−37%0.0%0.0 pts$19.9M+6.7%
12 months to Aug 2022$2.9M+487%0.0%0.0 pts$18.7M+12%
12 months to Aug 2021$501K+4.8%0.0%0.0 pts$16.6M+23%
12 months to Aug 2020$478K−83%0.0%0.0 pts$13.5M−8.3%
12 months to Aug 2019$2.9M+50%0.0%0.0 pts$14.7M−5.8%
12 months to Aug 2018$1.9M−6.2%0.0%0.0 pts$15.6M+9.8%
12 months to Aug 2017$2.0M0.0%$14.2M

Who supplies the US

August 2026. Small figures under each value are the change from August 2025. Landed cost by origin, below, adds freight and duty to the price.

CountryUS importsShareAverage priceDuty paidLast 13 months
Peru$53K50.0%−4.9 pts$698.30/tonne+20%12.5%+10.5 pts
France$27K25.2%−19.9 pts$702.24/tonne−8.2%10.0%0.0 pts
South Africa$26K24.8%new$693.00/tonne12.5%
All countries$106K100.0%$697.96/tonne+6.9%11.9%+6.3 pts

The 3 largest suppliers had 98.6% of US imports over the last 12 months.

Landed cost by origin

What importers paid to land this product at a US port from each main supplier, June–August 2026: the price, freight and insurance to the first US port, and duty, per unit. Suppliers with 3% or more of these imports, cheapest landed first. Small figures under landed cost are the change from the same months a year earlier.

  • Price
  • Freight and insurance
  • Duty
CountryPriceFreight and insuranceDutyLanded costMake-up
France$325.28/tonne$108.12/tonne33.2% of price$22.31/tonne6.9% of price$455.72/tonne−48%
South Africa$530.83/tonne$91.14/tonne17.2% of price$53.78/tonne10.1% of price$675.75/tonne−41%
Peru$694.97/tonne$69.34/tonne10.0% of price$75.29/tonne10.8% of price$839.61/tonne+19%
All countries$530.04/tonne$90.19/tonne17.0% of price$53.21/tonne10.0% of price$673.45/tonne−25%

Landed at a US port, France was cheapest, at $455.72/tonne: 32.6% below South Africa.

Landed cost from France fell 48% on a year earlier, to $455.72/tonne, mostly on price: $739.38/tonne then, $325.28/tonne now.

How the market is shifting

Peru gained the most share: 29.0% of US imports over the last 12 months, up from 22.9% in the 12 months before. South Africa lost the most: 53.6%, down from 58.0%. The charts show September 2024 to August 2026 for the 4 largest suppliers over the last 12 months.

  • South Africa
  • Peru
  • France
  • United Kingdom
  • All countries
Share of US imports
Show the numbers
MonthSouth AfricaPeruFranceUnited Kingdom
September 202442.0%15.4%42.6%0.0%
October 20240.0%73.8%0.0%26.2%
November 20240.0%48.9%38.1%0.0%
December 202478.6%21.4%0.0%0.0%
January 2025100.0%0.0%0.0%0.0%
February 20250.0%59.5%40.5%0.0%
March 202590.7%5.0%0.0%4.3%
April 20250.0%47.2%52.8%0.0%
May 20250.0%67.7%32.3%0.0%
June 202525.1%22.2%52.7%0.0%
July 202568.9%0.0%0.0%31.1%
August 20250.0%55.0%45.0%0.0%
September 20250.0%100.0%0.0%0.0%
October 202537.1%26.6%21.0%15.3%
November 20250.0%29.4%70.6%0.0%
December 20250.0%100.0%0.0%0.0%
January 20260.0%59.4%33.8%6.8%
February 20260.0%67.6%32.4%0.0%
March 202624.3%47.6%28.1%0.0%
April 202643.2%40.8%16.0%0.0%
May 202629.2%27.5%43.3%0.0%
June 202691.0%8.7%0.3%0.0%
July 202639.2%33.4%27.4%0.0%
August 202624.8%50.0%25.2%0.0%
Duty paid, % of value
Show the numbers
MonthSouth AfricaPeruFranceUnited KingdomAll countries
September 20240.0%0.0%0.0%n/a0.0%
October 2024n/a0.0%n/a0.0%0.0%
November 2024n/a0.0%0.0%n/a0.0%
December 20240.0%0.0%n/an/a0.0%
January 20250.0%n/an/an/a0.0%
February 2025n/a0.0%0.0%n/a0.0%
March 20250.0%0.0%n/a0.0%0.0%
April 2025n/a0.0%0.0%n/a0.0%
May 2025n/a10.0%10.0%n/a10.0%
June 202510.0%10.0%10.0%n/a10.0%
July 202510.0%n/an/a10.0%10.0%
August 2025n/a2.0%10.0%n/a5.6%
September 2025n/a10.0%n/an/a10.0%
October 202530.0%10.0%15.0%10.0%18.5%
November 2025n/a10.0%15.0%n/a13.5%
December 2025n/a10.0%n/an/a10.0%
January 2026n/a10.0%15.0%10.0%11.7%
February 2026n/a10.0%0.0%n/a6.8%
March 202610.0%6.2%10.0%n/a8.2%
April 202610.0%10.0%3.9%n/a9.0%
May 202610.0%10.0%10.0%n/a10.0%
June 202610.0%10.0%10.0%n/a10.0%
July 202610.7%10.0%4.1%n/a8.7%
August 202612.5%12.5%10.0%n/a11.9%

Where it enters the US

Main ports of entry over the 12 months to August 2026: US imports and share.

  1. New Orleans, LA$912K · 51.8%
  2. Savannah, GA$359K · 20.4%
  3. Newark, NJ$237K · 13.4%
  4. Norfolk-Newport News, VA$107K · 6.1%
  5. Charleston, SC$64K · 3.6%

Where US exports go

US exports were $1.8M in August 2026, up 27% from August 2025, and $18.4M over the last 12 months, down 2.6% on the 12 months before. Fastest-growing market with 3% or more of US exports: Germany, up 16%.

MarketLast 12 monthsSharevs 12 months before
Germany$3.4M18.8%+16%
China$3.0M16.5%−20%
Netherlands$2.7M14.8%+16%
Canada$1.4M7.5%−7.6%
Korea, South$1.2M6.4%−11%
Japan$1.2M6.3%+6.1%
Mexico$1.0M5.5%−12%
India$988K5.4%−12%
Other countries (22)$3.5M18.9%+3.9%
All countries$18.4M100.0%−2.6%

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; 60 have reported 2025 so far.

MarketImportsvs year beforeFrom the USUS share
Germany$18.6Min 2025−15%$1.9M10.5%
Spain$15.8Min 2025+17%$391K2.5%
China$14.3Min 2025−7.1%$4.8M33.7%
India$7.6Min 2025+11%$1.3M17.1%
Korea, South$6.3Min 2025−14%$1.2M19.4%
Italy$6.0Min 2025+16%$950K16.0%
Turkey$5.8Min 2025−34%$259K4.4%
Japan$5.6Min 2025+9.8%$1.2M21.3%

The biggest market outside the US is Germany, which imported $18.6M of this product in 2025, 10.5% of that from the US.

The US supplies 33.7% of imports into China, but under 10% into Spain and Turkey.

Of these, imports into Spain grew fastest: up 17% from 2024 to 2025.

Other products under heading 2508: clays not elsewhere specified (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite (calcined or not); mullite; chamotte or dinas earths. US trade over the 12 months to August 2026.

ProductUS importsUS exports
Bentonite, whether or not calcinedHS 2508.10$14.8M$166.7M
Clays (excluding expanded clays), not elsewhere specified, including common blue clay and other ball clays, whether or not calcinedHS 2508.40$6.1M$149.2M
Fire clay, whether or not calcinedHS 2508.30$596K$50.5M
MulliteHS 2508.60$10.3M$10.0M
Chamotte or dinas earthHS 2508.70$1.4M$1.7M
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 (tonnes), 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.
  • Landed cost adds Census's import charges (freight, insurance and other costs of bringing the goods to the first US port) and calculated duty to the customs value, per unit, across the product's 10-digit lines. It leaves out antidumping and countervailing duties, customs fees and transport inland. Prices are averages across the goods within the code, so a lower one can mean cheaper goods, not the same goods for less.
  • 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.

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