2.73 Ct. Blue Sapphire from Thailand

This transparent 2.73 carat oval blue sapphire combines precise proportions with a clean, vivid face up appearance, making it an excellent choice for collectors and connoisseurs. The gem measures 9.89 x 7.94 x 3.86 mm, and it has been cut in a mixed brilliant style to balance sparkling light return with a broad, even color distribution across the table. The clarity has been graded as very slightly included at eye level, a grade that indicates the inclusions are minor and do not detract from the visual impact when set, while the polish is excellent, producing crisp facet junctions and high surface luster. This sapphire is heat treated, which is the industry standard enhancement for blue sapphires to deepen and even out color, and it originates from Thailand, a source known for producing richly saturated, classic blue stones. The Natural Sapphire Company stands behind this stone with full disclosure of its treatments and origins, and this level of transparency is important to educated buyers who want to understand both the natural characteristics and the human interventions that optimize the gem.

From a gemological perspective this sapphire sits in a highly desirable intersection of weight, cut, clarity, and color. At 2.73 carats the stone is substantial enough to command presence in a ring or pendant, without the premium price step associated with much larger stones. The mixed brilliant cut uses a combination of pavilion and crown facet designs to enhance scintillation and depth, while the oval outline maximizes visual spread and finger coverage when set. The very slightly included clarity suggests that inclusions are limited to small crystals or fine silk when viewed with the naked eye, and their distribution is such that they do not form distracting patterns or negative transparency effects. The vivid color intensity classification indicates strong saturation combined with medium to medium dark tone, which is the sweet spot for blue sapphires when judged for both beauty and investment potential. Excellent polish contributes to optimal light return and surface sheen, reducing light leakage and enabling the stone to project a clean, authoritative blue.

The origin of Thailand and the disclosure of heat treatment are meaningful to buyers who evaluate provenance and treatment history as part of overall value. Thai sapphires often exhibit a rich, slightly cool blue that reads as classic and versatile in many jewelry styles. Heat treatment is a long established and stable enhancement that improves color without compromising the integrity of the corundum structure, and it is widely accepted by reputable labs and the market. When assessing why this sapphire holds value, consider the balance of attributes. The gem is natural corundum, scored with a hard wearing Mohs rating that makes it suitable for daily wear, it has a desirable carat weight that offers visual impact, it has vivid saturation desirable to collectors, and its clarity and polish are high grade. Together these factors give the stone both aesthetic and investment credibility. The Natural Sapphire Company sources and evaluates gems with rigorous standards, ensuring that buyers receive accurate information to make informed decisions when acquiring natural colored gemstones.

How this sapphire performs under different lighting conditions explains much about its everyday appeal. In bright daylight the mixed brilliant cut and excellent polish allow the gem to deliver strong scintillation, with flashes of vivid royal blue and a sense of depth toward the pavilion. Daylight tends to show the truest, coolest aspect of the stone, highlighting its saturation and allowing any subtle pleochroic differences to be seen as shifts between deep blue and a slightly paler blue when the stone is rotated. Under incandescent or warm LED sources the color will often appear richer and slightly fuller, with an intensified depth and a hint of velvety character that can make the blue read warmer and more enveloping. Under cool fluorescent lighting the stone may appear a touch crisper, emphasizing facet contrast and fine reflections. In low light or candlelight the gem will take on a more velvety, darkly saturated appearance, where surface luster becomes the key visible attribute and the color can appear near midnight blue while still retaining a subtle inner glow. Because of the mixed brilliant cut, the sapphire balances scintillation and color concentration, so it will sparkle actively in bright conditions while preserving an even and desirable color field in softer light. When set in different metals, the perceived color can shift slightly, with warmer metals like yellow gold adding a touch of warmth to the perceived tone, and white metals like platinum or white gold maintaining the cooler, classic blue presentation. The Natural Sapphire Company can advise on settings that maximize the gem's visual properties, and we welcome specific questions about how this stone will pair with different design choices.