Chameleon diamonds alternate color when chilled in liquid nitrogen

Some chameleon diamonds alternate from gray (left) to yellow (proper) when submerged in liquid nitrogen

Jae Liao

Creditors lusting after the rarest of gemstones have a brand new sort so as to add to their checklist: diamonds that modify color when made extraordinarily chilly.

Those aren’t the primary gemstones identified to switch color: so-called “chameleon diamonds”, first found out in 1866, transfer their hue from greenish to both brown or yellow when heated to about 200°C or stored in the dead of night for greater than 24 hours.

However whilst grading diamonds for purchasers, Stephanie Persaud at …


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