- Stone12
- Reports3
3.31 Ct. Zircon from Tanzania
This loose stone is available to ship now
Item ID: | K19586 |
|---|---|
Dimensions (MM): help | Length: 8.39 Width: 7.34 Height: 5.07 |
Weight: | 3.31 Ct. |
Color: help | Brownish Yellow |
Color intensity: help | Medium |
Clarity: help | Very Slightly Included |
Shape: help | Oval |
Cut: | Mixed Brilliant |
Cutting style: | Faceted |
Enhancements: help | Heat Treated |
Origin: help | Tanzania |
Per carat price: help | $70 |
This transparent brownish yellow zircon, presented by The Natural Gemstone Company, weighs 3.31 carats and is fashioned into an oval shape with dimensions of 8.39 by 7.34 by 5.07 mm. The gem has been cut in a mixed brilliant style to balance facet brilliance and face up size, and it exhibits a clarity grade recorded as very slightly included, evaluated at eye level. Color intensity is classified as medium, and the surface finish reflects an excellent polish. The stone has undergone controlled heat treatment to refine its hue and optimize optical performance, and its documented origin is Tanzania.
The geological history of this zircon reaches back millions of years, to a time when silica rich magmas intruded into the continental crust and high grade metamorphism reshaped existing rocks. Zircon, a zirconium silicate mineral, crystallized early from these magmatic melts, incorporating trace impurities and structural defects as it formed. Over extensive geological time scales, subsequent tectonic activity, pressure, and temperature fluctuations altered crystal lattices and created radiation induced color centers that contribute to the brownish yellow appearance. Erosion and transport processes concentrated gem quality fragments within host pegmatites and metamorphic veins, where selective mining recovered crystals suitable for cutting. The Tanzanian geological setting provided the conditions for both primary crystallization and later modification, yielding material with the transparency and stability valued in faceted gemstones.
The current state of the gem reflects both its deep time origins and careful human intervention. Heat treatment was applied to lessen brown overtones that result from natural radiation effects and to enhance the clarity of color, while the mixed brilliant cut and excellent polish reveal the zircons notable refractive properties, delivering internal fire and crisp facet reflections. At 3.31 carats, with its measured proportions and very slightly included clarity at eye level, this piece is appropriate for precision mounting where the stone can be viewed and appreciated directly. The Natural Gemstone Company documents the stone attributes and provenance, providing technical clarity for gem setters and collectors who require reliable specification and geological context.
