Vogati 0.20 Cts Black Diamond & 0.85 Cts Aquamarine Ring in 10K White Gold Aquamarine is a hard and durable gem measuring 7.5-8 on Moro's scale, however a hard hit can cause its cracking. The ring has a light blue colored cushion cut Aquamarine. The black diamonds are AA quality. 30 Day No questions asked Return Policy Conflict Free Diamonds Free-Shipping within US