3.68 Ct. Blue Sapphire from Thailand

This transparent blue sapphire weighs 3.68 carat, and measures 10.93 x 8.87 x 4.46 mm, yielding a depth ratio of approximately 45 percent, a dimension that contributes to controlled light performance and comfortable setting profiles. The gem is cut in an oval outline with a mixed brilliant cut, integrating a brilliant facet arrangement on the crown and complementary pavilion faceting to optimize return of light and face up color. The table and crown facet geometry present well proportioned facets that provide scintillation across movement, while the pavilion angles have been calibrated to balance light leakage and color saturation. The polish is excellent, preserving crisp facet junctions and minimizing surface diffusion, which enhances apparent clarity and creates a clean, high quality face up presentation.

Clarity has been graded as very slightly included, evaluated at eye level, meaning that the stone is free of any significant visual distractions to unaided observation and maintains strong transparency. The color intensity is described as dark, producing a deep, saturated blue that reads richly in both daylight and incandescent lighting conditions. The stone has been heat treated, a stable and widely accepted enhancement in the trade that improves color uniformity and overall appearance without materially affecting durability. Origin is Thailand, which is known for producing sapphires with dense, velvety blue tones, and this provenance can be relevant to market perception and pricing. The combination of excellent polish, precise mixed brilliant cutting and eye clean clarity yields a gem that performs well in both jewelry and investment contexts.

From an investment perspective this 3.68 carat oval represents a compelling entry point into the natural sapphire market, given its combination of size, cut quality and color saturation. Larger sapphires in the three to five carat range with strong face up color are relatively scarce, and well executed cuts such as this one enhance liquidity because they are easier to market and reframe in different settings. Heat treatment is accepted by the trade, and documented origin from Thailand supports transparent provenance, factors that contribute to stable valuation. Collectors and investors increasingly favor stones with precise cutting, excellent polish and minimal eye visible inclusions, and these attributes can support future appreciation as supply of comparable quality material tightens. This sapphire is offered by The Natural Sapphire Company, and comes to market as a technically refined, investment grade gem suitable for both high level jewelry and long term asset allocation.