4.05 ct Cambodian Blue Zircon — Oval Mixed Cut

Collector's Note

A vivid 4.05-carat Cambodian blue zircon with crisp brilliance, lively dispersion and a well-proportioned oval silhouette. Its saturated electric-blue appearance and strong face-up brightness give the stone immediate visual impact.

Gemstone Details

Gemstone: Blue Zircon
Weight: 4.05 ct
Cut: Oval Mixed Cut
Measurements: 9.05 × 7.32 × 6.00 mm
Origin: Cambodia
Treatment: Heated (standard for blue zircon)

O50 Collector Evaluation

35/50 — Distinguished

Treatment

Blue zircon gets its color from gentle heating of brownish zircon crystals, a practice in Cambodia for generations. Nearly every blue zircon sold has been heated, and the color is stable in everyday wear. One tip: keep it away from tanning beds and UV nail lamps. Strong ultraviolet can give it a temporary brownish cast, which a short time under an ordinary incandescent bulb restores.

Digital Gem Passport

OTZ-2026-01738