Ruby in Marble Matrix Faceted Fan Beads have a glass-like luster, the crackled feathering of the matrix stone gives the bead a fair polish quality, the excellent gem faceting creates a symmetrical shape, the gem colors are a grey marble with tiny grey-black incusions common to marble, a creamy veining and the ruby gem which has grown within the parent stone. These opaque beads show a unique view into the early creation of these precious gems.