description Star Ruby Overview
The Star Ruby is a variety of corundum renowned for its captivating asterism. This optical phenomenon arises from tiny inclusions of rutile that create six-rayed star patterns when viewed under light. Historically, Burma (Myanmar) was the primary source of exceptionally vibrant examples. These gemstones are typically cut into cabochon shapes and are favored by collectors and jewelers crafting unique jewelry pieces.
help Star Ruby FAQ
What causes the star effect in a Star Ruby?
The six-rayed star effect, known as asterism, is caused by microscopic needle-like inclusions of a mineral called rutile. When light hits the polished dome of the ruby, these intersecting needles reflect light to form a moving star pattern.
Where are the finest Star Rubies found?
Burma, which is now known as Myanmar, has historically been the premier source for the world's finest Star Ruby specimens. These stones are highly prized for their deep, rich red color and exceptionally sharp asterism.
What mineral is a Star Ruby made of?
A Star Ruby is a variety of the mineral corundum, which is an aluminum oxide. The trace element chromium within the corundum is responsible for giving the gemstone its iconic red coloration.
How is a Star Ruby cut differently from a regular faceted ruby?
Instead of being cut with multiple flat geometric facets, Star Rubies are almost always cut as smooth, domed shapes called cabochons. This specific cabochon cut is necessary to properly display the six-rayed star effect across the surface of the stone.
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