3.71 Ct. Blue Cabochon Sapphire from Ceylon (Sri Lanka)

This listing presents a single transparent blue sapphire weighing 3.71 carats, with an oval outline and measured dimensions of 9.14 by 7.33 by 5.67 millimeters. The gem is fashioned in a double cabochon cut, producing smooth, domed surfaces on both the crown and the pavilion, and an even, tactile profile that emphasizes the inherent color and clarity of the material. Origin is identified as Ceylon, Sri Lanka, a source known for producing sapphires with strong saturation and appealing optical depth. The item displays an intense color intensity, described as rich and saturated, and the surface is finished to an excellent polish, yielding a glossy, reflective appearance when viewed under typical lighting conditions.

The clarity of this sapphire is graded as eye clean, evaluated at eye level, indicating that there are no inclusions or features that materially affect the appearance to an unaided observer. Under loupe or microscope magnification minor internal characteristics may be present, consistent with natural origin, but these do not detract from the overall visual quality. The double cabochon form accentuates color uniformity and provides a smooth play of light across the dome, resulting in a deep, even tone of blue when observed face up. Proportions are well balanced for this style, offering a substantial face up presence while retaining adequate depth to preserve color saturation and structural integrity. The excellent polish enhances light return and luster, contributing to a lively surface sheen that complements the gem's saturated hue.

This sapphire has been subjected to controlled heat treatment, an enhancement commonly applied to sapphires to improve color and clarity in a stable and permanent manner. Heat treated sapphires from reliable sources such as Ceylon typically demonstrate long term stability under normal wear conditions, and the treatment does not require special precautions beyond standard gem care. For routine maintenance, gentle cleaning with warm water and a mild detergent is recommended, using a soft brush to remove surface residue. Professional cleaning methods including steam and ultrasonic procedures are generally acceptable for heat treated corundum, however it is prudent to consult a qualified jeweler prior to such treatments, particularly if the stone is mounted.

The weight, dimensions, and double cabochon form make this sapphire versatile for a range of jewelry applications, from a substantial ring center to a refined pendant or brooch focal point. The smooth domed surfaces and even color distribution favor closed back settings and bezel mounts, which can protect the gem while showcasing its deep, intense blue. For clients seeking a more traditional set, skilled bench work can incorporate the gem into bespoke designs that respect the cabochon profile and emphasize the natural beauty of the stone. This piece is presented by The Natural Sapphire Company, where attention to accurate measurement, transparent disclosure of enhancements, and clear provenance are integral to our approach. Should you require additional measurements, light performance imagery, or guidance on setting options, our specialists are available to provide technically informed support.