These are the semi-precious Dumortierite beads or components we currently have in stock.
A deep blue stone, with occasional small traces of grey to cream inclusions (most bead related items are made from Dumortierite aggregate, rather than Dumortierite crystal). The aggregate is equivalent to quartz in hardness, though.
Handpicked limited stock 50mm round gemstone donuts. Due to the size, these donuts contain many natural gemstone characteristics. Typical hole size is ~12mm.