9.28 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This 9.28 carat oval blue sapphire presents a precise combination of size, proportion, and natural origin, making it a notable example of gemological quality. The stone measures 12.99 by 10.31 by 8.21 mm, and its mixed brilliant cut marries brilliant style crown facets with complementary pavilion faceting to optimize light return and scintillation. The material is transparent with an intense color intensity, displaying the vivid blue saturation associated with premium Ceylon Sri Lankan sapphires. Clarity has been evaluated as eye clean at eye level, and the gem exhibits an excellent polish that contributes to crisp facet junctions and lively surface reflection. Importantly for collectors and jewelers, this sapphire shows no enhancement, retaining its natural state from the mine to the mounting, and its documented origin is Ceylon Sri Lanka. The Natural Sapphire Company stands behind these specifications and provides full disclosure regarding treatment status and provenance.

Durability is a central attribute of this sapphire, and its suitability for daily wear rests on a combination of hardness, toughness, structural characteristics, and stable surface condition. As a gem of the corundum family, sapphire ranks at nine on the Mohs hardness scale, making it one of the hardest natural gemstones after diamond. This high hardness confers strong resistance to surface scratching from everyday materials, which preserves polish and facet crispness over long periods of regular use. Unlike minerals with pronounced cleavage planes, corundum has no true cleavage, which reduces the risk of a catastrophic split along a single plane when subjected to impact. Toughness can vary between individual crystals, but well cut and intact sapphires such as this example generally exhibit sound resistance to chipping with normal wear, provided the mounting offers appropriate edge protection. The excellent polish and absence of surface-reaching enhancements further reduce potential vulnerability, since there are no surface coatings or fillers that could degrade with exposure to heat, solvents, or cleaning.

The mixed brilliant cut and the stone proportions contribute both to visual performance and to practical durability in jewelry. The combination of small, precisely faceted crown elements and a pavilion designed for efficient light return yields strong brilliance and scintillation while maintaining sensible facet angles and girdle thickness that avoid excessive fragility. The 8.21 mm depth supports a balanced pavilion, and the oval outline distributes potential impact stress more evenly than pointed shapes, making it well suited for high wear pieces such as rings and bracelets. The eye clean clarity grade, assessed at eye level, means there are no inclusions visible to unaided sight that might act as internal stress concentrators under mechanical shock. The intense color intensity remains uniform across the table and through the pavilion, indicating consistent crystal quality and a lack of surface altering treatments. Excellent polish ensures smooth facet intersections that are less prone to microabrasion and easy to maintain with routine professional cleaning and gentle home care.

For practical application in jewelry the combination of natural, untreated origin, robust corundum hardness, and the considered cutting style make this sapphire an excellent choice for daily wear pieces. Recommended mountings include slightly protective prong settings with well formed prongs, bezel or semi bezel settings that shield the girdle and crown rim, or low profile settings that reduce exposure to direct knocks. Routine care involves avoiding prolonged exposure to harsh chemicals and extreme heat, and using mild warm soapy water and a soft brush for regular cleaning. Occasional professional inspection of the mounting and a gentle polish if needed will maintain the stone and setting over many years. The Natural Sapphire Company provides full technical details and condition notes for this 9.28 carat Ceylon blue sapphire, enabling informed decisions by designers, retailers, and private clients who require a durable, naturally untreated gemstone suitable for everyday use.