Natural Green Tourmaline · 1.639 ct · Oval · exceptional gemstone · Unheated

This natural Green Tourmaline weighs 1.639 carats and is fashioned in a refined oval mixed cut, combining attractive olive-green colour with exceptional internal cleanliness, high transparency and very good vitreous luster.

Measuring approximately 7.9 × 6.3 × 4.4 mm, the gemstone presents balanced oval proportions and an elegant face-up appearance. Its size is particularly attractive for jewellery applications where strong colour and clarity are desired without requiring a larger centre stone.

The gemstone displays a pleasing olive-green body colour, accompanied by subtle light green reflections under direct illumination. These tonal variations add brightness and depth to the stone while remaining consistent with the naturally pleochroic character of Tourmaline.

Green Tourmaline is traditionally referred to in the gemstone trade as Verdelite, a colour-variety designation used for green members of the Tourmaline group. The exact mineral species within the group should only be assigned when specifically established by mineralogical testing.

One of the principal quality characteristics of this specimen is its exceptional internal cleanliness. The gemstone is transparent and presents a clarity comparable to IF, with no significant inclusions readily visible under normal examination and only extremely minor natural characteristics potentially observable under magnification.

This very clean internal structure allows excellent light transmission through the gemstone and contributes strongly to its clear, open appearance and attractive luster. High-clarity Green Tourmaline of this size can be particularly appealing because the colour remains easy to appreciate without substantial interference from inclusions.

The oval mixed cut is assessed as Very Good, producing a balanced presentation of colour and brightness. Good to Very Good symmetry supports the overall outline and facet arrangement, while Good to Very Good polish produces clean reflective surfaces and a strong vitreous luster.

The combination of transparent material, very high clarity and efficient cutting allows light green reflections to move across the olive-green body colour under changing illumination, adding visual liveliness without representing a separate optical phenomenon.

The gemstone is recorded as unheated, preserving its naturally observed colour and internal characteristics without documented heat enhancement.

With its elegant olive-green colour, exceptional IF-comparable clarity, very good cut quality and strong vitreous luster, this 1.639 ct natural Green Tourmaline offers an unusually clean and refined appearance. Its combination of transparency, colour, proportion and untreated condition makes it particularly attractive for fine custom jewellery or a carefully selected gemstone collection.