5.37 Ct. Greenish Blue Tourmaline from Ceylon (Sri Lanka)

This exceptional greenish blue tourmaline weighs 5.37 carats and is presented in a classic cushion shape, measuring 11.83 x 9.59 x 6.74 mm, offering an ideal balance between presence and wearable size. Cut in a faceted mixed brilliant style, this gem combines a carefully faceted crown with a precision pavilion that maximizes light return and scintillation. Clarity has been evaluated at eye level as very slightly included, which means the stone is visually clean to the unaided eye while retaining natural inclusions that confirm its identity and origin. The color intensity is classified as intense, producing a deep, captivating blue with subtle green overtones that change with viewing angle and lighting. The polish is excellent, creating crisp facet junctions and a smooth surface that enhances both brilliance and perceived depth. Importantly for the discerning buyer, this tourmaline has received no enhancement, and its reported origin is Ceylon Sri Lanka, a source with a long storied reputation for producing fine colored stones. The Natural Gemstone Company is pleased to offer this piece as part of our curated selection of natural, untreated gemstones.

From a lapidary perspective the mixed brilliant cut on this cushion shaped tourmaline was chosen to optimize both brilliance and color saturation. The mixed brilliant style employs a brilliant faceting pattern on the crown to promote sparkle, while the pavilion facets are arranged to control light leakage and deepen the color when viewed through the table. This particular stone exhibits notable depth and a well balanced pavilion, which contributes to the intense tone without appearing overly dark. Tourmaline is known for pleochroism, and this greenish blue specimen displays subtle color shifts when rotated under directional light, allowing a wearer to experience a range of blue and green nuances depending on angle and background. The very slightly included clarity grade indicates small internal features that are typical for natural tourmaline. These inclusions are not detrimental to durability or beauty, and they serve as internal fingerprints that help gemological laboratories and experienced buyers confirm natural origin. The excellent polish further accentuates the gem while preserving crisp outline and defined brilliance across its table and facets.

The heritage of this tourmaline is rooted in the long gemological history of Sri Lanka, historically known as Ceylon, where gemstones have been mined, traded, and skillfully cut for centuries. Ceylon has been synonymous with some of the world finest colored stones, and while sapphires often receive the most attention, skilled Sri Lankan miners and cutters have a deep tradition of locating and crafting tourmalines with exceptional color and clarity. Traditionally tourmaline has been valued across many cultures as a protective and healing stone. In South and Southeast Asia tourmaline variants were used as talismans, set into amulets, and incorporated into ceremonial jewelry, valued for their perceived ability to bring balance and calm. In more recent history gem traders and collectors have prized Ceylon tourmalines for their unique colors derived from local geological conditions, where trace elements such as iron and copper interact with borosilicate crystal structures to produce blue and green hues. For an educated buyer the provenance from Ceylon is meaningful because it ties the gem to a known geological and cultural context, and it frequently correlates with the refined cutting traditions that yield stones with both strong color and pleasing optical performance.

For practical use and long term enjoyment this 5.37 carat cushion tourmaline is versatile in design applications. Its size and shape make it ideal as a central stone for a statement ring, a pendant that sits close to the collarbone, or a custom piece where a single natural gem is the focal point. For rings consider secure four or six prong settings or a low bezel for everyday wear, keeping in mind that tourmaline rates approximately seven to seven and a half on the Mohs scale which requires reasonable protection from hard knocks. Cleaning is straightforward, using warm water, a mild detergent, and a soft brush, and avoiding prolonged exposure to high heat or harsh chemicals since the stone is untreated and its natural color should not be compromised. At The Natural Gemstone Company we provide detailed information on origin and treatment, and we stand behind the natural, unenhanced status of this tourmaline. We are available to advise on setting styles, metal choices, and design techniques that will maximize the gem color while protecting it in daily wear. For buyers who value genuine provenance, expert cutting, and natural color, this greenish blue cushion tourmaline from Ceylon represents a rare combination of beauty, heritage, and gemological integrity.