Woodbridge Antiques has dated this piece to the 1960s.
The bloodstone is shot through with flecks of red, and is a deep green brown. (The bloodstone shows more green in certain lights but this proved hard to capture in the photographs.)

A classic vintage style ring, with plenty of substance!
In great pre-owned condition.
Measurements:
Ring size S 1/2 Stone size: 1.2 cm x 1.4 cm Depth of setting 3.5 mm Width of band at base: 4 mm
Weight: 10.65 grams
Weights and measurements are approximate.
Woodbridge Antiques has dated this piece to the 1960s.
Specialists in quality antique silver, fine jewellery & accessories
You can view the stock and full dealer information on the Woodbridge Antiques Profile Page