Gypsum

Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO₄·2H₂O. It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, drywall and blackboard or sidewalk... Wikipedia

Alabaster: Fine-grained, slightly colored

Cleavage: Perfect on, distinct on

Crystal habit: Massive, flat. Elongated and generally prismatic crystals

Crystal system: Monoclinic

Fracture: Conchoidal on, splintery parallel to

Luster: Vitreous to silky, pearly, or waxy

Satin spar: Pearly, fibrous masses

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Gypsum Powder for Mushroom Substrate (5 lb), Lab Grade, Garden Soil Amendment (Calcium Sulfate Dihydrate), Packaged in HEPA Enclosure

Gypsum - 2 oz

Ld Carlson 6106b Calcium Sulphate (Gypsum) - 1 lb., Size: 1 lbs, White

Premium Lab-Grade Gypsum Powder - HEPA-Packaged Soil Amendment for Mushroom Growers, Rich in Calcium & Sulfur, Promotes Strong Plant Roots &

American Gypsum 1/4-in x 4-ft x 8-ft Regular Drywall Panel | 752278214084

Down to Earth Organic Garden Gypsum Calcium Sulfate, 5 lb

Earth Science Gypsum 5000 sq ft 25 lb

The Andersons NutraSoft DG Pelletized Gypsum 6,600 sq ft 40 lb Bag, Size: 40 lbs

Earth Science Fast Acting Gypsum (25 lb.)

Calcium Sulfate Dihydrate - Gypsum - CaSO4*2H2O - 5 Pounds

Down to Earth Organic Garden Gypsum Calcium Sulfate, 5 lb, Size: 5 lbs

50lb Solution Grade Diamond K Gypsum Fertilizer Powder, Size: 50 LBS NET WT. (22.68 KG)

Soil Doctor Organic Gypsum 1000 sq ft 40 lb, Size: 40 lbs

Earth Science Fast Acting Gypsum with Nutri-Bond Run-Off Reduction Technology 2.5 lb, Size: 2.5 lbs

Espoma Organic Garden Gypsum 30 sq ft 6 lb

Gypsum