3.31 Ct. Blue Sapphire from Thailand

This 3.31 carat oval blue sapphire from Thailand presents a transparent body with dimensions of 9.62 by 7.40 by 5.32 mm, a mixed brilliant cut, and an intense color saturation, a combination that favors both depth of tone and lively faceted return. The mixed brilliant style integrates a shallow, faceted crown with a series of precise pavilion facets to maximize scintillation while preserving weight, and this stone displays that balance with an even table and controlled light leakage. At gemological evaluation the clarity is graded slightly included, evaluated at eye level, with inclusions that do not compromise overall transparency or the gemometer of light return, and the polish is excellent producing crisp facet junctions and bright facet mirrors. This sapphire has been heat treated, a standard and stable enhancement for corundum, applied to optimize color uniformity and reduce silk, and the result is a consistent intense blue without evidence of surface reaching or filling, as examined under standard viewing conditions.

From a lapidary and setting perspective this sapphire benefits from a design that respects its oval geometry and mixed rich pavilion structure, The Natural Sapphire Company suggests settings that allow both table up viewing and side light entry to exploit pleochroic shifts toward deeper velvety blue under oblique light. The stone's crown facet arrangement responds well to narrow bezels that thin at the girdle to preserve perceived spread, or to low prong heads that secure the girdle without interrupting the crown reflections. For cutting and finishing considerations prior to mounting, maintaining the current pavilion angles and reflowing facet junctions with a light repolish will sustain the intense color and maximize brilliance, while any attempt to deepen pavilion angles would risk internal extinction given the stone's proportions. The excellent polish means minimal additional lapidary work is required, which preserves weight and optimizes yield for bespoke settings.

When composing a custom piece this sapphire pairs exceptionally with white diamonds to provide high contrast and optical sparkle, a halo of small brilliant round melee diamonds in the 0.01 to 0.05 carat range will enhance perceived table brilliance and create a luminous frame that accentuates the sapphire's intense blue. For a more chromatic contrast consider two tapered baguette or kite shaped white diamonds as side stones in a three stone ring, they will emphasize length and provide directional light flow across the crown facets. Warm metals such as 18 karat yellow gold will introduce a subtle warming effect that can make the blue read slightly richer, appealing for vintage inspired mounts, while platinum or 18 karat white gold will preserve coolness and maximize contrast with white diamond accents. For more adventurous color harmonies, a halo of very light cornflower blue sapphires or small aquamarines will create a tone on tone composition that enhances the blue spectrum, or alternating melee of white diamond and small yellow sapphire will provide lively contrast and a contemporary signature look. Throughout the design process The Natural Sapphire Company will advise on facet orientation, prong positioning, and complementary stone calibrations to ensure the finished piece balances optical performance, wearability, and the unique character of this 3.31 carat Thai sapphire.