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Showing posts with label Phenomenal Gemstones. Show all posts
Showing posts with label Phenomenal Gemstones. Show all posts

Monday, May 27, 2024

Dual-Color Double Chatoyancy In Emerald

The way the cabochons are cut along with parallel tube-like inclusions could have caused double chatoyancy. Many thanks to Gems & Gemology for sharing the info.


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Tuesday, August 15, 2023

Star Aquamarine

Take a look as the asterism (6-ray star-like) in aquamarine which I think is quite rare. Many thanks to Jessa Rizo of GIA Carlsbad for the report.


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Tuesday, September 06, 2022

Three-Rayed Asterism In Quartz

The multi-star phenomenon could be caused by structural features or inclusions. The way the stone was cut could also be a factor. 


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Friday, June 10, 2022

Star Topaz From Vietnam

The uneven distribution of inclusions explains why some rays became blurred or vanished while others were continuous and sharp. But still it was intriguing to observe the rare phenomenal optical effect.


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