Cushion cut Cobalt Blue Spinel

Rare cobalt blue spinel in cushion cut 3.94 carats, Tanzania

Beyond rare vietnamese cobalt blue spinel in cushion cut 1.58 carats, Luc Yen

Cobalt blue spinel in cushion cut 3.02 carats, Tanzania

Cobalt blue spinel 2.45 carats, Tanzania

Unique cobalt blue cushion cut spinel from Tanzania 7.08 ct, GRS

Blue cobalt cushion cut spinel 1.50 carats, Tanzania

Cobalt blue spinel from Tanzania 3.51 ct