5.51 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This C.Dunaigre certified Blue sapphire presents as a 5.51 carat, emerald cut stone with dimensions 12.42 x 8.37 x 5.37 mm, an architecture that emphasizes step faceting and planar symmetry. The emerald cut layout produces broad, parallel facets and a large table, creating the classic hall of mirrors effect that reads color as a solid, even plane rather than as scintillating flashes. Proportions yield a depth approximately 51.7 percent which is optimal for balancing face up spread with internal color saturation, so the stone maintains vivid color intensity while avoiding the overly dark appearance that can occur with deeper pavilion angles. Excellent polish on all facet junctions preserves crisp facet termination and sharp light return, and the clarity grade is very slightly included when evaluated at eye level, placing any internal features beneath the threshold of typical unaided inspection and allowing the stone to present with a clean, transparent appearance.

Origin and treatment are disclosed, the sapphire being from Ceylon Sri Lanka and subjected to standard heat treatment to enhance tone and saturation, a stable and widely accepted practice within fine colored stone trade. The primary hue reads as pure blue with vivid saturation characteristic of high quality Sri Lankan material, and the step facet arrangement accentuates uniform color distribution across the table and crown. Certification by C.Dunaigre confirms the stated weight, dimensions, origin, and treatment, and provides laboratory substantiation of the gemological observations. From a craftsmanship perspective the emerald cut requires precise facet alignment to avoid windowing and to ensure the color parcel reads homogeneously, and this example demonstrates careful cutting to minimize light leakage and maximize face up color.

When set in jewelry this vivid blue sapphire offers versatile skin tone complementarity, and mounting choices should be made with chroma and tone in mind. On cool, fair complexions a platinum or white gold setting will enhance the stone’s crisp, pure blue character by reinforcing cooler color contrast, producing a very clean optical separation from the skin. On warm or olive complexions yellow or rose gold provides a complementary counterpoint that warms the overall presentation and increases perceived saturation. On darker skin tones the vivid blue presents as luminous and highly visible, and a low profile prong setting will maximize face up color while preserving the stone’s bold presence. For finger wear the rectangular proportions of this emerald cut also visually elongate the finger when set with the long axis parallel to the shank, and The Natural Sapphire Company can recommend precise bezel or prong engineering to secure the gem while preserving its optical performance.