Exclusive ring set with 1 blue topaz: +-4.00CT, surrounded by 40 small blue diamonds + 12 white diamonds.

Exclusive ring set with 1 blue topaz: +-4.00CT, surrounded by 40 small blue diamonds + 12 white brilliant diamonds, color: I and clarity: VS. Set in 18kt white gold (marked 750). Ring size: 50-52

Estimation
1,500€ - 2,000€