In astronomy, asterism is the word for the phenomenon of identifiable clusters of stars forming recognizable images. In gemology, asterism is the phenomenon of corundum containing fine needles of rutile (the same inclusions which give sapphires their highly coveted "silk" like appearance in faceted stones) reflecting light in a characteristic six-rayed pattern, commonly know as a star. This beautiful 28.54 carat star sapphire isn't the touchstone of a constellation, but its gleam will be eye-catching enough to have people wondering if you've been swapping with Orion. This imposing Ceylon sapphire can be seen from every angle using our high-tech 3D interactive stone system.