Sardonyx: the Ultimate Jewellery Guide

Sardonyx may not be as famous as diamonds or sapphires, but this striking gemstone has been treasured for thousands of years. Known for its distinctive bands of reddish-brown, white, and black, sardonyx combines the grounding energy of onyx with the warmth of sard. The result is a gemstone rich in symbolism, character, and timeless appeal.

History & Symbolism of Sardonyx

The name comes from the Greek words sard (reddish-brown stone) and onyx (meaning nail or claw, later used to describe layered stones). In ancient Rome, sardonyx was carved into cameos and signet rings, prized for its durability and dramatic contrasts. Warriors wore it as a talisman for courage, strength, and protection in battle.

Across cultures, sardonyx has symbolised integrity, endurance, and grounding energy. Today, it is associated with confidence, protection, and stability in relationships.

Sardonyx is also the birthstone for August (alongside peridot and spinel), making it a thoughtful and unusual birthday gift.

Popular Sardonyx Jewellery Styles

Sardonyx is often cut into cabochons or carved cameos to highlight its natural banding. Popular styles include:

• Sardonyx Signet Rings – A nod to its Roman heritage, bold and characterful.

• Cameo Brooches & Pendants – Classic Victorian style pieces.

• Statement Cabochon Rings – Highlighting the stone’s unique layers.

• Beaded Bracelets or Necklaces – Earthy, grounding jewellery with natural appeal.

How to Choose a Quality Sardonyx

• Colour & Banding: Look for sharp contrast between bands of red, brown, white, or black.

• Cut: Cabochon cuts or carvings are most common, showing off natural patterns.

• Size: Larger stones are widely available, making sardonyx an affordable option for bold jewellery.

Caring for Sardonyx Jewellery

Sardonyx rates around 6.5–7 on the Mohs scale, so it is fairly durable but needs some care.
Care Tips:

• Clean with warm soapy water and a soft cloth.

• Avoid harsh chemicals and ultrasonic cleaners.

• Store separately to prevent scratches from harder gemstones.

• Remove rings before heavy work or sports.

Final Thoughts

Sardonyx is a gemstone with history, personality, and grounding beauty. Its rich bands and deep symbolism make it a meaningful choice for anyone seeking jewellery with character. Whether in a bold signet ring, a carved cameo, or a modern cabochon design, sardonyx jewellery carries timeless strength and style.

Explore our selection of gemstone jewellery at Hallmark the Jewellers — and discover the enduring charm of sardonyx.

Hallmark: The Ultimate Jewellery Guide | Hallmark the Jewellers