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Showing posts with label Lab Notes. Show all posts
Showing posts with label Lab Notes. Show all posts

Friday, July 31, 2020

Corundum Inclusions In Gem Diamond

Diamond inclusions are fascinating. The only previously recorded occurrence of chromium-bearing corundum as an inclusion in a gem diamond was nearly 40 years ago. Lab Notes. GIA New York.


Useful link:
https://www.gia.edu/gems-gemology/spring-2020-labnotes-corundum-inclusions

Formation Of The Matryoshka Diamond From Siberia

The unusual diamond, nicknamed the Matroyshka after the traditional Russian nesting dolls, in Siberia in 2019, attracted widespread interest in how this feature formed. Lab Notes. GIA New York.


Useful link:
https://www.gia.edu/gems-gemology/spring-2020-labnotes-matryoshka-diamond-siberia

Solid Carved Dark Gray Diamond Ring

A ring made entirely of natural diamond. Lab Notes. GIA New York. This is the first time I am seeing it.


Useful link:
https://www.gia.edu/gems-gemology/spring-2020-labnotes-solid-carved-dark-gray-diamond-ring