selenite

"The construction workers used sheets of gypsum to build the interior walls of the new house. "

"She is giving her friend a book. "

"My little brother loves to play with his collection of glassy marbles. "

"The student's knowledge of grammar was deficient, making it hard for her to complete the writing assignments. "

"The box containing my old toys was stored in the attic. "

"The student derived the answer to the math problem from the formula. "

"The beans had a grainy, gritty texture in her mouth."

"The formula for calculating the area of a rectangle is length times width. "

"The geologist found a beautiful mineral specimen in the rock collection. "

"The gardener used fertilizer to help the flowers in the garden grow bigger and stronger. "

"The factory uses selenium in the process of making red-colored glass. "

"The scientist studied the chemical composition of the soil sample. "