Snowflake obsidian (volcanic glass) from Utah has been a worldwide favorite for many years for cabochons, beads, and more. (Stock 560) This is prime material which will take a great polish. The white to light gray snowflakes (cristobalite) are of a medium size and the contrast with the black background is nice. Sizes of the rough are from 1/2- 1 plus pounds each. When slabbing, for a nicer pattern, try to orient the snowflakes so that they are as round as possible. Price listed is for one pound.