Description

Some Umba sapphires display a color change effect reminiscent of alexandrite’s, changing from light violet-red to light green depending on the light source. Umba sapphires are mainly known for their range of orange-red, orange, and orangy golden yellow colors. These unique colors are due to various coloring elements including chromium, manganese, iron , titanium, and high proportions of vanadium.

It should be noted that Umba sapphires, unlike most other sapphires, are virtually never treated, which makes them very unique and extremely rare.