As you can see from the picture, 'Diamond shaped' is kind of a loose term for the shape of these beads. The garnet is fairly clear though, and the sizes are similar. Beads vary in size from about 5x5mm to 8x6mm. Sold on 14 inch long strands.
NOTE: Because this is an economy strand there may be broken, poorly shaped or mis-drilled beads on each strand.