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Showing posts with label Heat Treatment. Show all posts
Showing posts with label Heat Treatment. Show all posts

Saturday, April 10, 2021

Low-Temperature Heat Treatment Of Pink Sapphires From Ilakaka, Madagascar

Insightful report by GIA. Heat treatment is an evolving experiment. More samples from reliable sources will be required to produce consistent results. A must read for gemologists, collectors, colored stone dealers and curious consumers.