Star Sapphire: Low vs High Dome

Dreamer_D · 2023-03-20T19:48:05+00:00

I am on the hunt for a lovely star sapphire for a ring project. Thanks to the many knowledgeable folks who have posted their gems in this forum, and especially the wonderful “Show Me Your Star Sapphires and Rubies” thread, I feel like I have been able to find answers to most of my questions. But I haven’t been able to find an answer to this one! I have noticed some star cabs have very bulbous domes, and especially many of the large and highly valuable specimens I have seen here. But many also have much lower domes with just a slight convex. My question is: what effect does dome height have on the optical properties and value of a star gem?

Thread starter Dreamer_D
Start date Mar 20, 2023

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Star Sapphire: Low vs High Dome