gypsum

Lynas however, says its by-product from rare earth refining produces a non-toxic, non-radioactive magnesium-rich gypsum and an iron phosphate with a very low level of naturally occurring radioactive material.

From Barron's ● Apr. 22, 2026

For the rest of the building is disappointingly lackluster—boxy white galleries and corridors in “painted gypsum board,” i.e., sheetrock.

From The Wall Street Journal ● Dec. 17, 2025

Additionally, the basin was filled with layers of salt and gypsum.

From Science Daily ● Oct. 8, 2025

The best remedy for high pH, Wallace said, is to add gypsum to your soil and avoid things that can make the soil more alkaline, such as crushed concrete.

From Los Angeles Times ● Apr. 24, 2025

He also brought back sacks of gypsum, and Mom mixed it with water to make Venus de Milo sculptures from a rubber cast she ordered through the mail.

From "The Glass Castle" by Jeannette Walls

To class it according to the type of European formations I would range it among the gypsums, often muriatiferous, that cover the Alpine limestone or zechstein.

From Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 by Humboldt, Alexander von