These high-quality, consistently sized tumbled gemstones are supplied loose in bags of 50, ideal for filling your own displays. With their appealing look and tactile feel, these versatile tumbled stones are popular with collectors, crafters, and retailers alike, as they can be used for a variety of purposes. Obsidian is a naturally occurring volcanic glass formed inigneous rock. It is produced when lava flowing from volcano cools rapidly. Obsidian is hard with very sharp edges, which were used in the past in cutting and piercing tools. Small, white, clustered crystals of cristobalite in the black glass produce snowflake patterns. Individual gemstone size: 2-3cm RRP 99p – £1.99
