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Search Result > Total (8) Items Found. Sort By :  Price  |  Price Per Carat  |  Weight  |  Shape 

Asterism is a well-known optical phenomenon that can be observed in a wide range of cabochon-cut gem materials, but is most commonly associated with corundum (i.e. ruby and sapphire). The effect is viewed from above as a four, six or twelve-rayed star-like pattern, which is essentially multiple chatoyancy formed from two or three independent cat’s eye bands that bisect at the center. The vast majority of asterated gem materials display epiasterism, whereby the phenomenon arises due to the reflection of light from multitudes of needle-like inclusions within the material. However, rose quartz’s star effect is only visible when transmitted light is shone through from behind the stone, and is thus a rare example of diasterism.

Asterated specimens are usually given the varietal name “star” followed by that of the specific gem species and/or variety to which they belong (e.g. star sapphire, star diopside, star spinel, star ruby, etc.).

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WSA0147
Star Garnet Cabochon
$ 35.00
1 pcs 10.30cts

 
WSA0151
Star Garnet Cabochon
$ 35.00
1 pcs 9.05cts


 
JDA0600
Burmese Star Ruby Cabochon
$ 700.00
1 pcs 2.85cts

 
OCG0262
Star Sapphire Cabochon
$ 570.00
1 pcs 2.12cts

 
OCG0263
Blue Star Sapphire
$ 1,000.00
1 pcs 2.45cts

 
OCG0264
Star Sapphire Cabochon
$ 375.00
1 pcs 3.18cts

 
OCG0265
Star Sapphire Cabochon
$ 375.00
1 pcs 3.42cts

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