Ruby in Marble Matrix Pear Briolette measure approximately 17x8mm up to 25x11mm in size, have a glass-like luster, the crackled feathering of the matrix stone gives the bead a fair polish quality, the faceting creates a symmetrical pear shape with generous depth, the gem color is a dark grey marble with tiny black inclusions common to marble and the ruby gem has grown within the matrix stone, and the beads show a unique view into the early creation of these precious gems.