1.60 Ct. Yellowish Brown Tourmaline from Ceylon (Sri Lanka)

This transparent 1.60 carat oval tourmaline measures 9.04 by 6.90 by 3.90 millimeters, with a length to width ratio of approximately 1.31 and a depth proportion of approximately 49 percent, dimensions that present a broad, elegant face up appearance. The stone displays an intense yellowish brown hue with a very slightly included clarity grade evaluated at eye level, excellent polish, and no enhancement, offering a natural, untreated specimen from Ceylon, Sri Lanka. The cutting style is faceted in a mixed brilliant configuration, and the combination of weight, proportions, and eye level clarity provides an appealing balance between color saturation and brilliance that will satisfy both collectors and connoisseurs.

The mixed brilliant cut used on this oval tourmaline is specifically selected to enhance the gem's optical performance. The crown is faceted with brilliant style facets to maximize scintillation and dispersion of light, while the pavilion incorporates step related facet planes that control light return and intensify the stone's color. Tourmaline typically refracts light with indices between 1.624 and 1.644 and exhibits measurable birefringence between 0.018 and 0.040, properties that make facet geometry critical to performance. In this example, the mixed brilliant design directs incident light into lively flashes across the crown, while the step influenced pavilion prevents excessive leakage, producing sustained color depth and balanced brilliance. Additionally, tourmaline commonly shows pleochroism, and the oval outline with well proportioned facets allows subtle shifts in tone when viewed from different angles, revealing warmer golden yellow and deeper brown notes that enhance visual complexity.

For the educated buyer, this tourmaline from The Natural Gemstone Company represents a reliable and well documented example of quality. The absence of heat or other enhancements preserves collector value and ensures predictable behavior under different lighting conditions, important considerations for investment grade or bespoke jewelry projects. With a Mohs hardness of approximately 7 to 7.5 and excellent polish, this stone is suitable for daily wear in protective settings, and its classic oval silhouette makes it an excellent centerpiece for rings, pendants, or bespoke designs. If you require additional observations or certification options, The Natural Gemstone Company can provide further details and imagery to support appraisal and setting choices.