4.22 ct Cambodian Blue Zircon — Oval Mixed Cut

Collector's Note

A 4.22-carat Cambodian blue zircon with a classic elongated oval profile and bright blue color. The stone offers attractive brilliance and flashes of zircon's characteristic fire, with a slightly softer overall face-up performance than the higher-rated examples in this group.

Gemstone Details

Gemstone: Blue Zircon
Weight: 4.22 ct
Cut: Oval Mixed Cut
Measurements: 10.30 × 7.51 × 5.59 mm
Origin: Cambodia
Treatment: Heated (standard for blue zircon)

O50 Collector Evaluation

32/50 — Collectible

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-2026-01739