quartzite

"The old tannery still relied on grains for a traditional leather tanning process. "

"The geologist found a beautiful piece of quartz in the park. "

"The dog's trail led the park ranger to the lost child. "

"We are going hiking in the mountains this weekend for fun and exercise. "

"The project consists of three main parts. "

"The mountain climber carefully studied the rock formation before beginning her ascent. "

"By now, you must surely know which is which."

"The wood was sparkling in the bonfire."

"The puzzle pieces interlocking perfectly showed a beautiful picture. "

"to crush grapes"

"The geologist showed us a piece of metamorphic rock, explaining how intense pressure deep underground had transformed it from a sedimentary stone into something new and stronger. "

"Sunlight on the skin gives you vitamin D."