Vintage 9K 9ct yellow gold lab colour change Sapphire (Alexandrite) high setting solitaire ring.
Alexandrite-Sapphire refers to a laboratory-grown sapphire that has been manufactured
with trace elements that give it a colour-change effect similar to
natural Alexandrite.
This is a hydro thermally grown stone, some of the more valuable synthetic gems of any kind.
Dress cocktail party occasion large stone ring. Fully British hallmark of London assay dated 1975.
Size US- 6 1/2 UK- M
Stone 20x10mm, setting 25x15x8mm.
Total weight 5.05g
Cleaned and polished,comes boxed.