Vintage black onyx earrings bring a graphic contrast to sterling silver that few stones can match. Onyx is a chalcedony quartz with a Mohs hardness of 6.5–7, making it resistant to scratches and well suited for daily wear. The deep black color comes from carbon and iron inclusions formed over millions of years, often in volcanic regions of Brazil, India, and Uruguay. Our current collection features 7 pairs, priced from $730 to $2,281, each set in .925 sterling silver with natural, untreated onyx.
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Yes. Black onyx is a natural variety of chalcedony quartz. It forms in the gas cavities of lava and rates 6.5–7 on the Mohs hardness scale.
Wipe with a soft, damp cloth and mild soap. Avoid ultrasonic cleaners and harsh chemicals, which can dull the stone surface over time.
Onyx is durable enough for daily wear. Its hardness resists scratches, though storing earrings separately prevents contact damage with harder gems.