Jewelry designer Jacqueline Cullen’s obsession with the color black rivals my own, so it’s not too surprising that I’m smitten with her Whitby jet jewelry. Whitby jet is a fossilized wood that’s dark as night, and her strategic pairing of it with black diamonds adds a subtle dimension to this dark style. For a memorable tone-on-tone design, look no further than Cullen for wood worth obsessing over.

Cuff in Whitby jet with black diamonds, $10,365

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JCK