These are calibrated micro diamond cut Ruby beads, also known as micro cuts. The many facets give these Ruby gemstones maximum sparkle. These micro cut Ruby round beads measure 4mm. You will receive approximately 100 micro diamond cut Ruby beads on a 16" strand. Surely, you could use some of these micro cut Ruby beauties in your stash. Rubies are a stone of royalty, and known to enhance love and passion.