39cm strand (approximately 39 beads) of lava rock round beads, each bead is approximately 10mm x 10mm. Lava rock is a black/grey coloured gemstone, believed to help the wearer develop stronger ties with the planet and the earth. It is a fabulous lightweight irregular black lava gemstone, and looks great in mens and womens jewellery. These beads have had a wax applied to them to keep their shape and colour, so have a slightly waxy feel to them. Please note that colours and sizes within semi-precious gemstones vary slightly from strand to strand.