Large nicely faceted, approximately 5 ct translucent rich red ruby onion briolette or half-drilled faceted bead (prob. Madagascar) mounted on 5.66 g total weight 10 k gold reversible pendant. One side is white gold with 0.25 ct diamond (25 @ 0.01 ct ea), and the other side is yellow gold filigree. Sturdy and well-made.