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Open-Seam Mining · Pit-to-Plant Delivery

GYPSUM.GRADED.GUARANTEED.

≥ 90%

CaSO₄·2H₂O Purity

20–200 mesh

Particle Range

850K tons/yr

Annual Capacity

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850,000

ST/yr

Annual Production Capacity

≥ 90%

purity

CaSO₄·2H₂O Guaranteed

< 0.5%

Cl⁻

Max Chloride Content

24–48h

lead

Spot Load Availability

ASTM C22

certified

Set-Retarder Standard

Raw agricultural gypsum lump — open-seam deposit, pale crystalline matrix

Raw agricultural gypsum lump — open-seam deposit, pale crystalline matrix

Grade AG-1 · Soil AmendmentAG Grade

Agricultural Gypsum

High-purity calcium sulfate dihydrate for alkaline and sodic soils. Improves soil structure, supplies plant-available calcium and sulfur, and displaces sodium without altering pH. Sourced from open-seam deposits with consistent mineralogy across every load.

Chemical & Physical Specifications
CaSO₄·2H₂O (Dihydrate)≥ 90.0%
Calcium (Ca)20.8–22.5%
Sulfur (S)16.2–17.8%
Free Moisture≤ 3.0%
Chloride (Cl⁻)≤ 0.05%
Particle Size (D90)≤ 3/8 in (9.5 mm)
Mesh Range20–100 mesh
OMRI Listed— Organic UseAAPFCO— Fertilizer Grade
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Lead Time & Pricing

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SPEC SHEET
& QUOTE

Four fields. No marketing survey. Our materials team responds within one business day with grade-specific pricing and available tonnage windows.

ASTM C22 documentation on every shipment
FOB mine-gate or delivered pricing available
Minimum order: 25 short tons
Rail, truck, and bulk-bag options

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Grade WB-2 · Wallboard CrudeWB Grade

Wallboard-Grade Crude

Consistent crude gypsum sized for rotary kilns and stucco calcining lines. Low free moisture reduces drying energy. Tight mineralogy variance means your calcine lines run to schedule — not to the last shipment's assay.

Chemical & Physical Specifications
CaSO₄·2H₂O (Dihydrate)≥ 85.0%
CaSO₄ (Anhydrite)≤ 4.0%
Free Moisture≤ 8.0%
Chloride (Cl⁻)≤ 0.02%
Insoluble Residue≤ 6.0%
Nominal Top Size2 in (50 mm)
ASTM StandardC471M — Gypsum Products
ASTM C471M— Chemical AnalysisASTM C22— Specification
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Crushed wallboard-grade gypsum aggregate — screened to kiln-feed specification

Crushed wallboard-grade gypsum aggregate — screened to kiln-feed specification

Cement-retarder gypsum fines — bagged powder, controlled grind for set-time regulation

Cement-retarder gypsum fines — bagged powder, controlled grind for set-time regulation

Grade CR-3 · Set-Retarder FinesCR Grade

Cement-Retarder Fines

Ground to controlled fineness for consistent set-time performance in Portland cement. Minimal anhydrite content prevents flash set. Every load ships with a certificate of conformance referencing ASTM C563 and C1038 test results.

Chemical & Physical Specifications
CaSO₄·2H₂O (Dihydrate)≥ 92.0%
Anhydrite (CaSO₄)≤ 1.5%
Free Moisture≤ 1.5%
Chloride (Cl⁻)≤ 0.01%
Blaine Fineness3,500–4,500 cm²/g
Mesh (% passing 100)≥ 95%
ASTM StandardC563 / C1038
ASTM C563— Sulfate ContentASTM C1038— Expansion TestEN 13279— EU Compliance
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For Engineers & Feasibility Studies

FULL PRODUCT DATA SHEET

Complete chemical assay data, particle size distribution curves, moisture content ranges, and ASTM/EN test method references for all three product grades — formatted for engineering review.

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