7.70 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent 7.70 carat oval blue sapphire measures 14.12 x 10.52 x 5.99 mm, and is cut in a mixed brilliant style that balances scintillation with color saturation. The clarity grade is eye clean when examined at eye level, which for a stone of this size is a significant attribute, because inclusions that are invisible to the naked eye preserve visual purity and allow the intense color to read strongly across the table. The gem displays intense color, and an excellent polish that maximizes light return and surface finish. The proportions yield a depth of approximately 48.6 percent based on the length and width, a proportion that supports both strong face up color and lively brilliance. This sapphire has been heat treated, a standard and widely accepted enhancement in the trade that improves color uniformity and transparency while remaining stable and permanent with normal wear. The material is from Ceylon, Sri Lanka, a source renowned for producing sapphires with a lively, bright blue character and excellent clarity, attributes that are perceptible in this example.

For an educated buyer this stone represents a rare combination of attributes, because sapphires over 7 carats that are both eye clean and possess intense Ceylon blue are uncommon in the market. Many stones reach this size with either a darker, heavily saturated tone that reduces vitality, or with visible inclusions that affect light performance. This 7.70 carat oval retains lively color saturation without becoming overly dark, and the mixed brilliant faceting has been executed to enhance both dispersion and color depth, which makes this gem versatile for larger rings and bespoke settings where face up appearance matters. Provenance from Ceylon adds another layer of desirability, due to the historical and gemological reputation of Sri Lankan material, and heat treatment disclosure aligns with responsible trade practices. At The Natural Sapphire Company we evaluate each stone against strict standards of size, clarity, color, cut, treatment, and origin, and this sapphire remains notable for its scarcity in both size and color intensity compared to similar options. For collectors and connoisseurs seeking a large, transparent Ceylon blue sapphire with fine cut quality and enduring visual appeal, this gem is an exceptional candidate.