Madagascar Blue Star Sapphire 3..22 carats 8.7x6.7mm special
This star sapphire from Madagascar has that very popular denim blue color along with a sharp nice star. A real pretty star sapphire.
When I first started collecting star sapphires back in the late 1980's, Madagascar Blue Star Sapphires always intrgued me. I love the variety of denim blue colors, the distinct star effect, and the relative low cost you could find them for. You could typically find them at a gem show in Tucson or Bangkok for $10-20/carat.
Nowdays though even finding them is a task, most you see that look like them are artificially colored or artificially enhanced with a star and finding the untreated ones are near impossible.