1.80 Ct. Bluish Green Opalescence Sapphire from Madagascar

I am pleased to present a beautiful transparent 1.80 carat oval bluish green sapphire, offered by The Natural Sapphire Company, with precise dimensions of 7.92 by 6.19 by 4.50 millimeters. This gem is faceted with a mixed brilliant cut, which combines table and crown facets for lively brilliance and a pavilion facet arrangement that deepens color, and it has an excellent polish for crisp facet reflections. The clarity has been graded as slightly included when evaluated at eye level, a grade that balances visible transparency with the natural inclusions that confirm origin and authenticity. The color intensity is described as intense, and the sapphire has been heat treated, a common and stable enhancement accepted in the trade that refines hue and improves overall appearance, while the gem is sourced from Madagascar, a locality known for producing richly colored sapphires with excellent crystal quality.

The bluish green hue of this sapphire is notable for a luminous opalescence, a soft milky glow that seems to emanate from within the stone rather than merely reflecting from the surface. This opalescence is subtle and refined, producing a soft inner light that complements the stone’s transparent body, creating a layered visual depth that changes gently with movement and lighting. In gemological terms, that inner glow arises from fine internal scattering and very fine inclusions that act as micro reflectors, diffusing light in a way that softens direct reflections and adds an almost pearly sheen. The mixed brilliant cut enhances this phenomenon by balancing fire and scintillation with larger windows of color, so the stone will display both lively sparkle and that characteristic milky sheen, a combination that is exceptionally desirable to collectors seeking a gem with both brilliance and an emotive glow.

When comparing this stone to famous sapphires in history, it offers a different but compelling narrative. Stones like the Logan Sapphire and many Kashmir examples are celebrated for intense pure blue tones and velvety saturation, while star sapphires like the Star of India are prized for asterism and a more opaque, mystical appearance. By contrast, this 1.80 carat Madagascar sapphire blends transparency with a bluish green palette and a gentle opalescence, making it more wearable and versatile than many historic museum pieces that emphasize size or unique phenomena. The slight inclusions noted at eye level are a normal and honest characteristic that affirm natural origin and provenance, they do not interrupt the gem’s transparency, and they contribute to the stone’s personality in the way that natural silk or crystal inclusions give individuality to celebrated historic gems. For an educated buyer, this offers a clear value proposition, because rarity is not only about size or celebrity provenance, it is also about distinct combination of properties, and a transparent, opalescent bluish green sapphire with intense color and excellent polish is uncommon and highly collectible.

From a market and practical perspective this gem is ready to be set into fine bespoke jewelry, ideal for a solitaire pendant, an elegant three stone ring, or a halo setting that can amplify the opalescent glow while protecting the stone. The Madagascar origin provides a modern assurance of strong supply but also of exciting color profiles that differ from classic Sri Lankan and Burmese examples, and heat treatment has been fully disclosed as part of ethical sales practice. At The Natural Sapphire Company we prioritize transparent grading and clear communication, and we can provide gemological documentation to accompany this sapphire. For the discerning buyer who values both the scientific aspects of gemstone grading and the aesthetic pleasure of an individual gem, this sapphire represents a rare balance of intense bluish green color, transparent clarity with a gentle milky opalescence, and skilled cutting that together create a luminous and wearable gem. Please contact The Natural Sapphire Company for further details, viewing options, and bespoke setting advice.