4.67 Ct. Zircon from Madagascar

This transparent 4.67 carat oval greenish blue zircon is an exceptional example of gem quality that balances weight, cut, and color in a single stone. The gem measures 9.80 by 7.72 by 6.00 millimeters, and its mixed brilliant cut is specifically chosen to maximize both scintillation and color saturation, combining a faceting scheme that brings lively sparkle from the crown while preserving depth of color through the pavilion. The intense color intensity is immediately apparent to the eye, a lively blend of sea green and azure that reads beautifully in both natural daylight and warm indoor lighting. Clarity is graded as very slightly included, evaluated at eye level, which means the stone is essentially clean to the unaided eye with only minor internal characteristics that do not detract from transparency or brilliance. An excellent polish ensures that facet junctions are crisp and light return is uninterrupted, contributing to the gem s overall visual impact. The stone has undergone a disclosed heat treatment, a stable and widely accepted enhancement in trade that refines color while leaving physical integrity intact, and the result is a vivid, market ready gem that will perform well in a range of settings.

From a gemological perspective this zircon offers attributes that educated buyers and collectors will recognize and value. Zircon is prized for a high refractive index and notable dispersion, properties that translate into exceptional brilliance and a lively play of fire when light enters the stone. Typical refractive index values for gem zircon fall in a higher range than many common gemstones, which is why faceting and polish can yield such scintillating results. The stone s specific gravity is relatively high compared with many gem materials, which gives it a pleasing sense of heft in a mounted setting. Zircon can exhibit birefringence, which is a diagnostic feature that may produce doubled facet lines under magnification, and this optical complexity is part of what makes zircon distinctive under the loupe. In terms of durability zircon sits in a moderate range of hardness, and because this piece has been heat treated, it is stable for everyday wear with appropriate care. We recommend avoiding sudden temperature extremes, steam cleaning, and harsh ultrasonic procedures, and instead advise routine cleaning with mild soap, warm water, and a soft brush to preserve polish and color.

The origin of this piece, Madagascar, significantly enhances its desirability and value for thoughtful buyers who prize provenance. Madagascar is recognized for diverse and geologically rich deposits, where complex metamorphic and alluvial processes yield gem material with distinctive trace element signatures that influence hue and saturation. A Madagascar origin speaks to limited and well defined sources, it supports traceability and often commands a premium among connoisseurs who appreciate regional differences in color and clarity. For the greenish blue tone present in this zircon, Madagascar material tends to show a lively, crystalline transparency and stable color that responds well to careful heat enhancement, making the finished gem both attractive and verifiable in terms of its background. At The Natural Gemstone Company we prioritize transparency and documentation, we disclose enhancements and origins so buyers can make informed decisions, and we can provide additional photographic documentation and magnified imagery on request. For setting considerations this oval format and mixed brilliant faceting are ideal for solitaire, halo, or three stone treatments where the stone s intense color and strong light performance are the focal point, and we recommend protective mounting options when the design calls for frequent contact. This Madagascar zircon represents a marriage of scientific interest, aesthetic appeal, and responsible provenance, qualities that make it a compelling acquisition for the educated buyer and collector.