4.36 Ct. Brownish Green Tourmaline from Ceylon (Sri Lanka)

This specimen from The Natural Gemstone Company is a transparent cushion shaped tourmaline weighing 4.36 carats, with dimensions of 12.01 x 8.67 x 5.66 mm. The gem displays a brownish green hue with intense color intensity, and it has been given a mixed brilliant cut to optimize light return. The clarity is graded very very slightly included at eye level, and the surface qualities exhibit an excellent polish. There has been no enhancement applied to this material, and the piece is attributed to Ceylon, Sri Lanka, a well regarded origin for tourmaline that contributes to its natural character and color profile.

The mixed brilliant cut combined with the cushion outline produces a balanced interplay of scintillation and broad color planes. The girdle to depth proportions result in a pleasing face up size for a 4.36 carat stone, with the 12.01 mm length and 8.67 mm width providing a substantial presentation when set. Internally the stone is effectively eye clean, the very very slightly included grade indicating only minor natural features that do not interrupt the visual field under normal viewing. The excellent polish preserves sharp facet junctions and a refined table surface, supporting clean light transmission and a controlled play of sparkle across the pavilion and crown facets.

From a practical standpoint tourmaline rates seven to seven point five on the Mohs scale of mineral hardness, providing a good balance of durability and workability for jewelry applications. For an engagement ring this hardness class will perform well in daily wear when set thoughtfully, and traditional protective approaches such as low profile bezels, halo designs, or four prong settings with secure cup work are advisable. Routine care can be managed with warm soapy water and a soft brush, and exposure to harsh chemicals or sudden extreme temperature changes should be avoided to maintain the integrity of the stone. Professional inspection of the setting at periodic intervals will help ensure the gem remains securely mounted and free from accidental damage.

This brownish green cushion tourmaline presents a refined alternative to conventional colorless centers, offering an intense yet understated palette that suits a contemporary engagement aesthetic. The combination of notable carat weight, a substantial cushion outline, eye level clarity, and natural, untreated origin creates a center stone that is both distinctive and suitable for long term wear. The Natural Gemstone Company can provide guidance on compatible metal choices, with yellow gold and rose gold enhancing the warm brown notes, and white gold or platinum offering a modern contrast to the green tones. For clients seeking a unique engagement option that emphasizes natural color, clarity, and responsible sourcing, this tourmaline represents a compelling choice.