4.20 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent blue sapphire weighs 4.20 carats and is presented in a classic cushion shape, with precise dimensions of 11.51 x 8.40 x 5.38 mm. The gem has been faceted using a mixed brilliant cutting style, combining the fire and scintillation of brilliant facets with the depth and presence of step facets, resulting in a balanced visual performance. Clarity is graded as slightly included when evaluated at eye level, which is consistent with natural sapphires of this size and origin, and the stone displays medium color intensity that sits squarely in a desirable range for wearable colored gemstones. The polish is excellent, producing crisp facet junctions and a smooth table surface that enhance light return and surface brilliance. The sapphire has undergone standard heat treatment to improve color and clarity, a widely accepted and stable enhancement within the trade, disclosed here in full.

Origin is Ceylon, Sri Lanka, and that provenance contributes materially to the gem value and character. Ceylon sapphires are prized for their lively, medium to medium deep blues that often exhibit a luminous, almost transparent quality, a product of the island s unique metamorphic geology and its long history of producing gem quality corundum. Provenance from Ceylon is associated with consistent market desirability, established cutting traditions, and documented supply chains, factors that support liquidity and collector interest. At The Natural Sapphire Company we emphasize transparency of origin and treatment, and we provide documentation that traces sourcing and any enhancements, supporting informed evaluation by jewelers and collectors alike. The combination of the gemstone s size, cushion outline, mixed brilliant faceting, and Ceylon origin results in a piece that is both technically sound and contextually valuable, offering a clear example of how geographic origin, cut quality, and professional disclosure together define the practical and market value of a sapphire.