1.65 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This listing describes a single high quality Sri Lankan blue sapphire presented by The Natural Sapphire Company. The gem is Other certified, blue Cornflower in hue, and weighs 1.65 carats. It is fashioned in a cushion shape with a mixed brilliant cut, and its measurements are 7.05 x 6.48 x 3.53 mm. The stone displays transparent clarity with a grade of very very slightly included evaluated at eye level, a medium intense color intensity, and an excellent polish. Enhancement heat treated. Origin Ceylon Sri Lanka. These specifications have been recorded to provide a clear and factual account of the gem for appraisal and design purposes.

The weight of 1.65 carats is a defining attribute of this sapphire and a primary indicator of its premium quality. At this carat weight, the stone occupies a meaningful presence on the finger or in any jewellery application, while retaining proportions that support strong light performance. In cushion shapes, a weight of 1.65 carats combined with the given dimensions produces an ideal balance between face up spread and depth, allowing the mixed brilliant cut to maximize internal reflection and scintillation. Carat weight remains one of the most visible measures of value in coloured gemstones, and in this instance the 1.65 carat mass reflects a significant investment in material rarity, cutting precision, and overall gem quality.

Colour and clarity characteristics further support the sapphire's premium standing. The Cornflower blue hue is associated with classic Ceylon sapphires and is expressed here at a medium intense level, yielding a tone that is vivid yet restrained and suitable for both traditional and contemporary settings. The sapphire is transparent, and the clarity assessed as very very slightly included at eye level indicates inclusions are minimal and do not materially affect transparency or visual appeal when mounted. The mixed brilliant cut engages the stone with numerous faceted planes, enhancing both dispersion and sparkle while preserving strong colour saturation. The excellent polish ensures clean facet junctions and optimal light return, contributing to the gem's lively appearance even under varied lighting conditions.

Treatment and origin information are important considerations for valuation and long term care. This sapphire has undergone heat treatment, a common and stable enhancement that improves colour saturation and clarity without compromising durability when performed to trade standards. The reported origin, Ceylon Sri Lanka, is renowned for producing Cornflower blues with a characteristic balance of hue and brightness, and this origin contributes to the gem's market desirability. The Natural Sapphire Company provides full documentation and certification to substantiate the Other certification and the measured specifications, allowing confident appraisal and setting decisions. Given its 1.65 carat weight, cushion shape, mixed brilliant cut, medium intense Cornflower colour, and VVS clarity at eye level, this sapphire is well suited to fine jewellery applications including engagement rings and bespoke commissions where both visual impact and refined quality are required.