Unheated Cut Ruby & Zircon Large Pendant on Sterling Silver Chain

Rare, Unheated. Naturally Magnificent.

In the world of fine gemstones, unheated rubies are among the most coveted. Unlike the vast majority of rubies on the market — which are routinely heat-treated to enhance colour and clarity — this stone has never been altered. What you see is exactly what the Earth created: a cut ruby of natural, untreated colour, accompanied by sparkling zircon accents, all set in a large sterling silver pendant on a sterling silver chain.

Details

• Centre stone: Natural, unheated cut ruby — corundum coloured by chromium, with no heat treatment or enhancement of any kind
• Accompanying stone: Natural zircon — one of the oldest minerals on Earth, prized for its exceptional brilliance and fire
• Setting: Large pendant, sterling silver (925)
• Chain: Sterling silver (925)
• Cut: Faceted ruby, maximising colour depth and light return
• Each pendant is unique — natural gemstones vary in tone, saturation, and inclusion character

Why Unheated Matters

Heat treatment is so common in the ruby trade that an unheated ruby commands a significant premium — even over treated stones of similar appearance. An unheated ruby carries a certificate of natural origin and is considered by collectors and gemmologists to be the purest expression of the gemstone. This is not just jewellery — it is a genuine collector's investment piece.

About the Stones

Ruby is a variety of corundum (aluminium oxide) with a Mohs hardness of 9 — one of the hardest gemstones on Earth. Its red colour is caused by trace amounts of chromium. Zircon (not to be confused with cubic zirconia) is a natural mineral with a refractive index rivalling diamond, producing extraordinary sparkle and fire that beautifully complements the ruby's deep red.

Care Instructions

Ruby is exceptionally durable. Clean with warm soapy water and a soft brush. Avoid ultrasonic cleaners for the zircon, which can be more sensitive to vibration. Store in a padded jewellery box and polish the silver setting with a silver cloth to maintain its lustre.