1.40 Ct. Blue Sapphire from Tanzania

This transparent 1.40 carat cushion shape blue sapphire from Tanzania presents a rare combination of size and color that is seldom found in the market today. The gemstone measures 6.48 x 6.41 x 3.65 mm, and its faceted mixed brilliant cut has been executed to maximize both color depth and lively scintillation. At a glance the rich, dark blue presence is immediately compelling, and when viewed closely the eye level clarity of very slightly included confirms a clean visual field that allows light to move through the stone with exceptional purity. This is a natural, unheated sapphire, it has no enhancement, and that alone separates it from the vast majority of comparable stones offered online and in showrooms. As a representative of The Natural Sapphire Company I can say that finding a cushion cut, unheated sapphire at this weight and with this intensity of color is an uncommon opportunity for collectors and those seeking a genuinely natural statement gem.

When comparing this stone to many other blue sapphires available, several advantages become clear. Many sellers offer heat treated sapphires to improve tone and clarity, and while heat treatment is an accepted practice in the trade, unheated material carries a measurable premium because the beauty comes from nature rather than from human intervention. The mixed brilliant cut on this piece creates a different visual performance compared with standard step cuts and classic antique cuts. The additional facets in a mixed brilliant arrangement generate stronger scintillation and face up with more lively flashes, while the cushion outline retains a timeless elegance. The very slightly included clarity grade, evaluated at eye level, means that this sapphire reads as clean and transparent in everyday wear, unlike many stones in similar price brackets that show visible inclusions under normal viewing. The excellent polish is the finishing touch that ensures return of light from every facet junction, enhancing both brilliance and color saturation.

Origin plays an important role in how a sapphire is perceived and valued, and Tanzanian sapphires have earned a reputation for producing interesting and attractive tones that differ from Sri Lankan and Burmese examples. Compared to typical Sri Lankan material which often presents a lighter cornflower blue, or Burmese stones which can carry a velvety royal blue with a particular silky depth, this Tanzanian example exhibits a darker color intensity that reads as rich and contemporary, yet it remains vibrant rather than dead. This dark intensity at a one point four zero carat weight is not common, especially in the unheated category, and it gives the stone presence on the hand that smaller or lighter toned gems simply cannot match. Furthermore, the cushion shape is highly versatile, fitting into both classic and modern designs, and when set it will display a larger face up area than many round or oval counterparts at the same weight, reinforcing perceived size and value.

From a value perspective this sapphire stands apart because it combines desirable factors that are rarely offered together. It is natural, unheated, of a collectible origin, cut to a mixed brilliant standard, and finished with excellent polish, all at a weight that is meaningful for rings and pendants. Buyers who compare this offering to mass market options will note the difference in longevity of appeal, and investors who look for provenance and natural state will recognize why a stone like this often retains or appreciates in value more reliably than treated alternatives. For those considering a bespoke setting, the cushion silhouette will accommodate a variety of mounting styles while allowing the deep blue to remain the focal point. As always The Natural Sapphire Company stands behind the authenticity and origin of our stones, and we are happy to guide clients through the specifics of setting and care so that this Tanzanian sapphire provides both daily enjoyment and smart long term value.