Command the attention of the global gemstone market with a true museum-caliber anomaly: a 150.00 Carat Natural Unheated Burma Blue Sapphire. Originating from the storied mines of Myanmar (Burma), reaching a monumental 150-carat weight while remaining completely untreated by heat is an extraordinarily rare feat in gemological history.
This monumental stone exhibits a rich, velvety royal blue hue with exceptional saturation and natural luster. Cut to excellent proportions and optical symmetry, it achieves remarkable face-up light refraction and brilliance across its vast surface. Graded as Slight VS clarity, it maintains incredible transparency and visual purity, showcasing only minor natural birthmarks typical of large untreated corundum.
Accompanied by an authoritative GRS (Gemresearch Swisslab) report confirming its completely unheated status and prestigious Burmese origin. An unrivaled acquisition for premier private collections, museum exhibitions, or sovereign investment portfolios.
Gemstone Specifications
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Gem Species: Natural Corundum
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Gem Variety: Natural Blue Sapphire (Unheated)
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Carat Weight: 150.00 ct
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Color: Royal Blue / Vivid Blue
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Cut Grade: Excellent
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Clarity Grade: Slight VS Clarity
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Geographic Origin: Burma (Myanmar)
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Enhancement/Treatment: None / 100% Unheated & Untreated
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Laboratory Certification: GRS Certified
Explore our complete selection of loose unheated sapphires or contact our senior gemologists to arrange a private viewing or custom commission details.
