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

As the moisture moved upward through the sand, it left behind minerals such as gypsum, which is commonly found in desert environments on Earth.

From Science Daily ● Mar. 15, 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

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

Dad lost his job at the gypsum mine after getting in an argument with the foreman, and when Christmas came that year, we had no money at all.

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 Alexander von Humboldt