Chameleon diamonds change colour when chilled in liquid nitrogen
Diamonds that change colour when heated or kept in the dark have been known since 1866, but now there is a third kind of chameleon gem
By Bas den Hond
Some chameleon diamonds alteration from grey (left) to yellowish (right) erstwhile submerged successful liquid nitrogen Jae Liao
Collectors lusting aft the rarest of gems person a caller benignant to adhd to their list: diamonds that alteration colour erstwhile made highly cold.
These aren’t the archetypal gems known to alteration colour: alleged “chameleon diamonds”, archetypal discovered successful 1866, power their hue from greenish to either brownish oregon yellowish erstwhile heated to astir 200°C oregon kept successful the acheronian for much than 24 hours.
But portion grading diamonds for clients, Stephanie Persaud astatine …
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