PLUSH, Ore. – Out where the sagebrush hugs the sky and the antelope roam nearby, there are sunbeams in stones, there for the taking. “Plush diamonds,” they were called by the lonesome cowboys who first stumbled upon sparkling stones while riding across the Rabbit Basin – a vast, flat stretch between Hart Mountain National Antelope Refuge and Lake Abert, 70 miles northeast of Lakeview and 20 miles north of the hamlet of Plush. “Heliolite,” said the geologists, using the scientific name for the transparent crystals of feldspar.