Large 8.50ct Natural Unheated Star Ruby Diamond Cluster Ring, GCS Certified, 18k Gold

A striking and substantial star ruby and diamond cluster ring centred on a large oval cabochon natural star ruby weighing approximately 8.50 carats.

Specifications:

Gemstone: Natural star ruby
Treatment: No indications of heating (GCS certified)
Weight: approx. 8.50 carats
Cut: Oval cabochon
Phenomenon: Six-rayed asterism

Diamonds: approx. 0.65 carat total (Est. VS-VVS, H-I-J Colour)
Metal: 18 carat gold (K18)
Ring size: O½ (UK) / 7.5 (US)
Gross weight: 7.3 grams
Certification: GCS London
Condition: Excellent

The ruby displays a distinct six-rayed asterism that moves cleanly across the surface of the dome under directional light. The stone shows an attractive purplish-red body colour with good transparency and a well-proportioned cabochon cut that enhances the visibility and symmetry of the star.

Surrounding the centre stone is a bright cluster of round brilliant cut diamonds, with additional diamond accents to the shoulders, all set in 18 carat yellow gold. The mounting is both elegant and substantial, designed to emphasise the scale and presence of the ruby.

Accompanied, as pictured, by a GCS Gemmological Certification Services (London) report confirming:

– Natural star ruby
– No indications of heating
– Weight approximately 8.50 carats
– Origin undeterminable

Untreated star rubies of this size are uncommon, particularly in wearable jewellery, making this an impressive and highly collectable gemstone ring. Natural inclusions visible at the base of the cabochon, consistent with untreated star ruby.

A bold and refined statement piece suitable for both collectors and everyday wear.

Condition & Authenticity

Each piece has been carefully inspected and is presented in very good condition, with wear consistent with its age and use. Materials and stones are assessed using standard industry methods and professional experience. Additional images or video are available on request.

Pricing & taxes

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