5.08 ct Cambodian Blue Zircon — Oval Mixed Cut

Collector's Note

A substantial 5.08-carat Cambodian blue zircon combining vivid blue color with strong brilliance and a broad, balanced oval face-up appearance. The larger size and energetic light return make this an especially appealing collector stone.

Gemstone Details

Gemstone: Blue Zircon
Weight: 5.08 ct
Cut: Oval Mixed Cut
Measurements: 9.98 × 8.13 × 6.41 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-2026-01740