2.9 ct. Natural Unheated/Untreated Thai Golden Star Black Sapphire Cabochon Gemstone with Six Golden Ray Star set in Brass Holder Ring for Display

Here is a Stunning Thai black star sapphire gemstone! The star is quite sharp with a 6 golden ray star mined in bangkaja, Chanthaburi, Thailand. This stone would be excellent for a ring-center stone. The star is visible in normal light conditions and is very sharp under a pen light or transmitted beam. 

Note: These temporary Brass ring settings should only be used for display purposes and minimal wearing until the stone can be properly set into gold or silver jewellery.

Thai Golden Star Black Sapphires are one of the most fascinating forms of sapphire. 

These sapphires differ from other colors of star sapphires because the star is formed not due to Rutile silk but due to Hematite plates (to which it also owes its golden colour). 

Such is the magnificence of the star that one can't help but fall in love with it! 

Specialty
Black Star Sapphires are often found from Thailand (Bang-Kha-Cha and Khao-Ploi-Waen) and West Africa (Guinea, Sierra Leone, Liberia). 

It often happens that aside from the star forming due to hematite plates, the gemstone also contains rutile silk the main ingredient for most star gemstones. 

Black star sapphires are usually low domed so as to best display the star as a very high dome would make the arms of the star invisible and only a golden sheen would be observed.

Mining areas
Black star sapphires are found from Thailand, Guinea, Sierra Leone, Liberia, Burma, India, Sri Lanka (Ceylon), Tanzania, and a few other localities. 

Black Star Sapphires from West Africa and India often display a Silver-Black, Purplish-Black or Pinkish-Black color, whereas those from Thailand, Burma, Sri Lanka & Tanzania bear a Golden-Black color.

We're proud to stand by our products as being certified unheated/untreated gemstones created naturally within the depths of the planet.