Contraluz is opal where you see the play of colors suspended inside by illuminating the back of the stone. In most opal the light has to fall on the front of the stone to see the play of fire.

Per Page Six, Swift wore Foundrae’s Forever & Always a Pair Pendant, which has an opal teardrop stone on ... She paired the necklace with Foundrae’s Sister Hook Heavy Belcher Chain Choker.