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Tag : Colour Grading

Unstable Colouration of Padparadscha-like Sapphires

Author(s) :

- Date : 2018

Tags : Colour Centres / Colour Grading / Colour Stability / Padparadscha / Sapphire

Unstable Colouration of Padparadscha-like Sapphires. Published in Journal of Gemmology, 2018, 36(4), 346-354.

Author(s) :

- Date : 2017

Tags : Colour Grading / Gemmology / Pigeon Blood / Royal Blue / Ruby / Sapphire

GAHK seminar March 2017 on Pigeon blood red & Royal blue by Dr. Michael Krzemnicki (SSEF)