1.66 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This specimen is a transparent 1.66 carat oval blue sapphire, presented in a classic proportioned outline with dimensions measuring 7.87 by 7.08 by 3.68 millimetres. The cutting style is a mixed brilliant cut, combining a faceted pavilion with a more modern crown to optimize light performance while maintaining an elegant oval silhouette. The gem exhibits an intense color intensity, with saturation that reads as a deep, vivid blue when viewed face up under standard viewing conditions. Clarity is graded as very slightly included, evaluated at eye level, indicating that the stone is essentially eye clean with only minor internal features detectable under careful inspection. The polish has been assessed as excellent, producing crisp facet junctions and an even, reflective finish across both crown and pavilion surfaces. Enhancement is disclosed as heat treated, a stable and widely accepted practice for improving color and clarity in corundum, and provenance is Ceylon, Sri Lanka, a source known for producing sapphires with lively color and refined tonality.

The mixed brilliant cut used on this oval sapphire has been executed to balance brilliance and color saturation, allowing the intense blue body color to remain dominant while still delivering lively scintillation from the facet arrangement. The crown facets capture and return light in a way that creates a compact, refined flash, while the pavilion facets support depth and richness, producing a pleasing face up appearance. With its dimensions and weight, the stone sits in a versatile size range that reads as an elegant centerpiece in rings, as well as a refined focal gem in pendants or bespoke jewellery commissions. The very slightly included clarity grade, assessed at eye level, means the inclusions do not materially detract from the gem’s visual presence for typical wear, and the excellent polish enhances transparency and optical performance, allowing the intense color and internal light return to be appreciated without distraction.

Ceylon origin informs both the expected hue and the overall aesthetic character of this sapphire, with Sri Lankan material often exhibiting bright, appealing blues that maintain a lively tone across varying light conditions. The documented heat treatment is consistent with standard industry practice for sapphires and, when performed properly, stabilizes and intensifies colour while improving clarity, without compromising the gem’s hardiness. Corundum’s inherent toughness and excellent wear resistance make this sapphire well suited for everyday jewelry use once set, while its proven provenance and treatment disclosure contribute to transparent, responsible collecting. When considered as part of a high end gemstone collection, this sapphire offers a clear profile, combining measurable specifications with visual attributes that collectors and connoisseurs evaluate, namely carat weight, precise dimensions, a refined cut, a declared clarity assessment, colour intensity, excellent polish, documented heat treatment, and a reputable origin.

As an addition to a high end gemstone collection, this 1.66 carat Ceylon blue sapphire embodies a balanced combination of measurable quality and aesthetic appeal, making it suitable both as an investment gem and as a candidate for fine jewellery commissions. The Natural Sapphire Company presents this piece with full disclosure of origin and enhancement, allowing collectors to make informed decisions based on objective characteristics as well as visual appraisal. For long term preservation, routine care is straightforward, involving gentle cleaning with warm water, mild detergent and a soft brush, avoiding harsh chemicals and sudden thermal shocks, and ensuring secure, professional setting for any mounting. A laboratory report or internal documentation can further accompany the stone on request, providing additional detail regarding its gemological attributes, and supporting its role as a considered acquisition for a curated collection.