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Quartz Family

Sardonyx

Banded red-brown and white chalcedony.

Natural colours
Mineral groupChalcedony
Chemical formulaSiO₂
Crystal systemTrigonal (microcrystalline)
Hardness (Mohs)6.5 – 7

Supplied by weight or by piece — raw, polished or made into jewellery. Sizes, grades and quantities on request.

About the stone

What is Sardonyx?

Sardonyx is onyx with bands of reddish-brown sard alternating with white chalcedony. Its straight, even layers made it the classic stone for cameos and seals.

The agate workshops of Khambhat in Gujarat have cut sardonyx and related stones for centuries.

Traditionally associated with

  • Strength
  • Self-control
  • Protection
  • Happy relationships

Care & cleaning

Clean with lukewarm water, a drop of mild soap and a soft brush, then dry with a soft cloth. Store apart from softer stones to avoid scratches.

Bulk & wholesale supply

Order Sardonyx in bulk

We supply raw stones, tumbled and polished pieces, carvings, beads and finished jewellery such as pendants and bracelets by the kilo or by the piece. Tell us what you need and we will reply with availability, sizes and lead time.

Photo credits
  • Photo: Warclachaja — CC BY-SA 4.0, via Wikimedia Commons — source
  • Photo: Warclachaja — CC BY-SA 4.0, via Wikimedia Commons — source
  • Photo: Warclachaja — CC BY-SA 4.0, via Wikimedia Commons — source