C. Dunaigre Certified Thai Ruby & Diamond Earring and Ring Set | 6.20ct Rubies | 18k White Gold

C. Dunaigre — the Swiss gemological laboratory founded in Geneva and counted among the most respected independent certification authorities in the world — does not issue certificates casually. Their certification of these Thai rubies as natural, with full documentation of origin and treatment status, represents a standard of authentication that serious collectors and institutions rely upon. Thailand has produced some of the world’s most celebrated rubies for centuries: stones of deep, vivid red with the characteristic warmth and saturation that define the finest examples of the species. This complete set — ring and earrings — brings 6.20 carats of C. Dunaigre certified Thai rubies and 1.54 carats of natural diamonds together in a unified design of enduring elegance.

The ring centers a 2.20ct Thai ruby in a halo of 0.54ct white diamonds, set in 18k white gold at 11.0 grams, sized at 6.5. The earrings feature 4.00ct of Thai rubies flanked by 1.00ct of diamonds, set in 18k white gold at 14.5 grams, with secure lever-back posts for confident all-day wear. Each piece mirrors the other in design language and gemstone quality — a matched set of the kind that is rarely encountered complete in the estate market. Pre-owned, very good condition.

Ring Specifications

• Metal: 18k White Gold
• Metal Weight: 11.0 Grams
• Ring Size: 6.5
• Setting Style: Halo
• Condition: Pre-Owned | Very Good Condition

Earring Specifications

• Metal: 18k White Gold
• Metal Weight: 14.5 Grams
• Closure: Post Lever Backs
• Condition: Pre-Owned | Very Good Condition

Gemstone Details

• Certification: C. Dunaigre — Swiss Gemological Laboratory
• Ruby Origin: Thailand — Heated
• Ring Ruby: 2.20 Carats
• Ring Diamonds: 0.54 Carats
• Earring Rubies: 4.00 Carats Total
• Earring Diamonds: 1.00 Carats Total
• Total Ruby Weight: 6.20 Carats
• Total Diamond Weight: 1.54 Carats

Why You'll Love This Piece

• C. Dunaigre certified — Swiss authentication at the highest level — C. Dunaigre is one of Geneva’s most respected independent gemological laboratories; their certification of these Thai rubies provides the provenance documentation that serious collectors, insurers, and estates require.
• 6.20 carats of Thai ruby — a complete certified set — acquiring a matched ring and earring set with this total ruby weight, unified design, and independent certification is genuinely rare in the estate market; complete sets of this quality rarely surface together.
• Thai ruby — centuries of gemological prestige — Thailand has been one of the world’s premier ruby sources for centuries, producing stones prized for their deep, vivid red and characteristic warmth; Thai rubies with laboratory certification carry both gemological and cultural provenance.
• Halo ring design — the setting that maximizes ruby presence — the diamond halo surrounding the 2.20ct center ruby amplifies the stone’s apparent size and frames its color with white brilliance; this is the setting that fine colored stones deserve.
• 18k white gold — the ideal metal for ruby and diamond — white gold’s cool, neutral tone maximizes the contrast with the rubies’ vivid red and the diamonds’ white brilliance; at a combined 25.5 grams across ring and earrings, the set has the substantial presence of investment-grade jewelry.