Chameleon diamonds change colour when chilled in liquid nitrogen

3 years ago 343

By Bas den Hond

Chameleon diamond

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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