1.51 Ct. Yellow Sapphire from Ceylon (Sri Lanka)

This yellow sapphire weighs 1.51 carat, and presents as a transparent heart shape with dimensions of 5.71 by 6.71 by 4.91 mm, an ideal ratio for a face up presence that balances brilliance with vivid color. The stone has been fashioned in a mixed brilliant cut, combining a faceted crown designed to maximize scintillation with a pavilion geometry optimized for internal light return. The mixed brilliant arrangement in a heart outline requires precise facet junctions at the cleft and lobes to maintain symmetry and to prevent light leakage, and this gem displays those characteristics with exacting facet alignment. Clarity is graded as very slightly included, evaluated at eye level, which in practice means minor internal features are present under magnification but do not disrupt the stone when viewed without optical aid. Polish has been assessed as excellent, resulting in crisp facet surfaces and sharp facet junctions that contribute to strong brilliance and the perception of depth within the stone.

Color is a primary attribute of this piece, described as intense in color intensity, with a pure yellow hue that reads bright and saturated across different lighting conditions. The cut has been executed to favor face up color saturation while preserving lively light return, a balance achieved by thoughtful pavilion depth and crown angle choices during cutting. Corundum properties are relevant to performance and durability, the material registering a hardness of 9 on the Mohs scale, which supports daily wear in well designed settings, and exhibiting a refractive index in the range typical for sapphires, which underpins its strong brilliance. Specific gravity values and birefringence remain consistent with quality Ceylon sapphires, which often combine clarity and vivid color. The heart form amplifies the stone s presence as a focal element, and the mixed brilliant faceting pattern enhances fire while maintaining a clean, saturated color field.

This sapphire has been heat treated, a stable and widely accepted enhancement that improves color and clarity in natural sapphires when disclosed responsibly. Heat treatment has been applied in a controlled manner to intensify the yellow tone and to relieve certain growth features, while preserving the intrinsic crystal structure and long term stability of the gem. Origin is Ceylon, Sri Lanka, a source renowned for producing sapphires with lively saturation and good clarity, and this provenance is an important part of the gem s character. The cutting and finishing were executed with attention to yield and optical performance, where the cutter prioritized preserving natural color zoning and maximizing face up area, resulting in a gem with excellent polish and balanced proportions. Documentation and full disclosure accompany the piece, providing the buyer with treatment information and origin context for responsible acquisition.

For the conscious consumer this sapphire aligns technical excellence with ethical sourcing practices typical of offerings from The Natural Sapphire Company, where traceability and supplier relationships are integral to procurement. The company works with partners to support responsible mining practices and to ensure that community benefits and fair wage principles are part of the sourcing model, and buyers receive transparent treatment disclosure and access to origin documentation. The stone s durability and classical heart silhouette make it suitable for a central engagement ring, a pendant or a bespoke design, and care in mounting is recommended to protect the pointed tip and the cleft of the heart through secure prong placement or a partial bezel. This gem is appropriate for collectors who value technical precision, documented provenance, and ethical stewardship, and The Natural Sapphire Company can provide additional gemological reports and bespoke setting consultation to integrate the stone into a considered, long lasting collection.