6.70 Ct. Yellow Sapphire from Ceylon (Sri Lanka)

This stone is a transparent yellow sapphire, weighing 6.70 carats, cut to an oval shape with finished dimensions of 11.36 x 8.29 x 7.92 mm. The faceting follows a mixed brilliant style, combining a brilliant cut crown with a more traditional pavilion to optimize both color and light return. Clarity is graded as very very slightly included at eye level, providing essentially eye clean appearance while retaining natural internal characteristics. Color is described as intense in saturation, with a vivid, evenly dispersed yellow throughout the table and crown facets. Polish is excellent, and the gem has not undergone any enhancement, making it a natural, unheated sapphire from Ceylon Sri Lanka. The provenance and treatment status are noted and documented by The Natural Sapphire Company.

Optical performance of this sapphire is distinguished by strong luster and scintillation that arise from the combined effect of corundum optical properties and the precision of the mixed brilliant cut. Corundum has a refractive index that produces noticeable light return and surface brightness, and the mixed brilliant design concentrates the light back through the table while creating a lively pattern of flashes across the crown. Compared with diamond, which exhibits higher dispersion and therefore greater spectral fire, sapphire presents a different kind of brilliance. Where diamond fire is colorful and highly dispersed, sapphire brilliance is characterized by crisp, high contrast flashes and saturated face up color. In this yellow sapphire, the intense hue works with the facet architecture to create an apparent increase in brightness, because the crown facets reflect and refract light in a way that emphasizes both scintillation and color saturation.

When placed alongside more common yellow gemstones such as citrine, yellow topaz, and synthetic materials, this Ceylon sapphire stands apart for several reasons. Citrine typically shows a lighter, more brownish yellow at larger sizes and has lower hardness, which affects long term durability and surface luster under wear. Yellow topaz can display pleasing brilliance but often has a paler tone or a tendency toward a golden brown cast, and it is commonly treated with irradiation to enhance color. Yellow sapphire from Sri Lanka offers a richer, more saturated yellow that maintains intensity at larger sizes, and its hardness of nine on the Mohs scale ensures excellent resistance to scratching. Compared with yellow zircon, which can have high dispersion and strong fire but is more brittle and sometimes ideal for smaller stones only, sapphire balances toughness and optical performance. The lack of enhancement in this stone further increases its desirability compared with many market examples that have been heat treated to modify color and clarity. The combination of intense natural color, eye level clarity, and an excellent polish produces a face up appearance that is brighter and more vivid than many commonplace yellow gems.

Practical considerations reinforce the sapphire s natural advantages for use in fine jewelry and collection pieces. At 6.70 carats and with an oval outline of 11.36 x 8.29 mm, this stone occupies a significant visual presence without requiring an overly large setting, making it suitable for center stones in rings, pendants, and statement earrings. The excellent polish and mixed brilliant faceting enhance wearability by maximizing usable light return while minimizing windowing and dark zones. The unheated origin in Ceylon Sri Lanka is an important attribute for collectors and those who value natural gemology, because it conveys geological provenance and preserves the integrity of the material. For customers seeking a durable, vibrant, and naturally colored yellow sapphire, this gem from The Natural Sapphire Company combines technical quality and aesthetic presence in a way that outperforms many more common yellow gemstones, both visually and in terms of long term stability.