A diamond and sapphire ring, 1st half of 20th century

yellow gold (unmarked), 1 round cut diamond weighing approx. 0,59 ct I/SI1, two further stones weighing approx 0,33 ct and 0,36 ct K/SI1, 1 oval cut faceted sapphire weighing approx. 0,85 ct, size: 17, weight: 4,85 ct