Large exclusive ring with 1 blue topaz, surrounded by 6 octagon-cut diamonds

Large exclusive ring with one blue topaz of +-20.00CT, surrounded by 6 octagon-cut diamonds, color: I and clarity: VS. Set in 18kt white and yellow gold. Ring dimensions: +-18mm by 20mm and ring size: 60-64, with a weight of 17.34 grams.

Estimation
3,000€ - 4,000€