This is an appealing antique 18ct solid gold opal solitaire gemstone ring. The opal gemstone is double claw-set into the ring, 'cushion shaped' and of size 10.0mm x 7.5mm. It is of superb quality and exhibits a range of bright vibrant colours in the light. It is exposed to the reverse side of the head of the ring. The upper regions of the shank are 'trifurcated' with open-work between and horizontal engraved markings below. There is an embossed '18ct' gold stamp mark on the inside circumference of the shank which equates to high gold fineness. Size 'J-K'(UK), 5.25(US). Weighs 2.9 grams. The ring is in excellent condition throughout with a genuine opal gemstone and without repair.
* An Opal gemstone is a hydrated(contains 6% to 10% water) amorphous(non-crystaline) form of silica(Silicon Dioxide), which makes it quite a soft gemstone.