Description

Offered here is a magnificent 7.34 carat Sardinian red coral cabochon, cut in a classic oval dome and measuring 15.2 × 11.1 × 5.6 mm. This coral, sourced from the Mediterranean waters off Sardinia, exhibits a saturated oxblood red hue—deep, warm, and exceptionally elegant.

It is well-polished with a smooth waxy luster, ideal for high-end bespoke jewelry. The stone is free of visible resin enhancements or dye, making it a desirable specimen in both vintage and contemporary coral markets.

Due to tightened restrictions on coral harvesting and export, authentic untreated Mediterranean coral like this one is growing increasingly rare. This piece is an excellent candidate for a custom heirloom pendant, ring, or as a centerpiece in a collector’s suite.

Gemstone Report – Sardinian Coral (Cabochon Cut)

Type: Natural Coral
Variety: Sardinian Red Coral (Corallium rubrum)
Weight: 7.34 carats
Shape/Cut: Oval Cabochon
Measurements: 15.2 mm (L) × 11.1 mm (W) × 5.6 mm (D)
Color: Deep Ox-Blood Red with Warm Undertones
Clarity/Surface: Smooth luster with even tone; some minor natural surface dimpling typical for untreated coral
Origin: Mediterranean Sea, Sardinia region
Treatment: Appears untreated (no visible dye or resin; subject to lab confirmation)
Hardness: ~3.5 on Mohs scale
Luster: Soft waxy to vitreous, well-polished

Gemological Notes

Sardinian coral (Corallium rubrum) is among the most prized types of natural coral due to its deep, rich red color, historical use in jewelry, and limited harvesting areas. Your cabochon features a classic oval dome shape, highly polished with a richly saturated red tone.

Its dimensions and polish make it ideal for mounting in a pendant or bold ring. Due to modern conservation restrictions on coral harvesting and export, natural untreated Sardinian coral has become increasingly rare and valuable.

Market Value Estimate (as of 2025)

Pricing assumes natural, untreated coral. If dyed or stabilized with polymers, value would decrease by 40–60%. This assumption is assumed correct with this lovely piece.

Retail (Boutique or Gallery) Estimated Price $650. to $950.

Private Sale $450. to $700.

Online Auction (Starting Bid) $195. to $295.

Expected Auction Realization $325 to $500

Estimated Retail Value: $650 – $950 USD

Date Issued: 2025-06-24