Padparadscha sapphire natural pinkish-orange coloration: Cr3+ and color centers?
4 Answers from travellers
The Padparadscha sapphire (named after the sacred lotus blossom) is an extraordinary natural variety of corundum exhibiting a harmonious blend of pastel pink and orange. This color is governed by dual chromophores: trace chromium (Cr3+) ions producing pink tones and stable hole-color centers combined with iron (Fe3+) producing warm orange hues. True natural Padparadscha from Sri Lankan gravel beds displays a balanced pastel equilibrium without artificial surface beryllium or chemical diffusion enhancements.
Under ultraviolet light, natural unheated Padparadscha stones exhibit a moderate orange-red fluorescence that aids laboratory origin verification.
Lab test memos from international institutes (GSEF, GIA) confirm unheated status by inspecting infrared absorption peaks around 3309 cm-1.
High-clarity unheated Padparadscha sapphires over 3 carats command exceptional per-carat valuations among global gemstone collectors.
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