5.07 Ct. Blue Sapphire from Thailand

One beautiful transparent 5.07 carat oval shape blue sapphire is presented by The Natural Sapphire Company, with dimensions of 12.25 by 9.18 by 4.77 mm, and a mixed brilliant cut that balances scintillation and depth. This sapphire exhibits an intense color intensity that reads as a rich, deep blue under standard daylight and photographic lighting, and it has an excellent polish that enhances surface luster and facet contrast. The stone has a clarity grade of slightly included when evaluated at eye level, which means there are natural internal characteristics that do not diminish the gem’s overall transparency or its ability to transmit light, and they often add to the stone’s individuality and natural character. The sapphire is heat treated, a widely accepted enhancement in the trade when fully disclosed, and its origin is Thailand, a source known for producing robust blue tones in corundum. Taken together, these attributes create a gem that is technically attractive, visually compelling, and responsibly presented to informed buyers.

When assessing quality, an educated buyer will focus on the four familiar factors of color, clarity, cut, and carat weight, and this sapphire performs strongly across each of these categories. The intense color intensity is the primary driver of value for blue sapphire, and this stone’s saturation and tone sit in a sweet spot where the blue reads as vivid without becoming overly dark, allowing light to penetrate and return from the pavilion facets. The mixed brilliant cut is designed to combine the fire of a brilliant style with the face up size and depth efficiency of a step influenced outline, which optimizes both brilliance and perceived size for an oval outline of these proportions. Clarity is described as slightly included at eye level, which for corundum typically indicates inclusions that are visible under casual inspection but that do not break the gem or require treatment beyond polishing, and in many cases these are whitish or rutile related characteristics that are stable and contribute to the gem’s identification as natural sapphire. The excellent polish ensures clean facet junctions and a bright surface, which enhances light return and minimizes light leakage around facet edges.

From a provenance and treatment standpoint, the stone’s origin in Thailand and its heat treated status are important pieces of information for collectors and connoisseurs. Thai sapphires are often associated with saturated, sometimes slightly velvety blue tones that appeal to buyers who prefer a classic, regal palette, and the presence of heat treatment is consistent with standard industry practice to stabilize and intensify color in natural corundum. Heat treatment, when performed properly, is permanent and does not materially affect the durability of the sapphire, because corundum is a refractory mineral and responds predictably to controlled thermal enhancement. For a buyer who values transparency of information, the combination of documented origin, disclosed enhancement, and clear grading comments provides confidence about what they are acquiring, and it allows for fair comparison against other stones of similar weight and cut. The corundum family’s inherent hardness of nine on the Mohs scale gives this sapphire exceptional wearability, making it an appropriate choice for everyday jewelry such as rings, as well as heirloom pieces intended for long term use.

This 5.07 carat oval sapphire is also exceptionally versatile in design, fitting equally well into casual and formal settings, and it offers designers and owners a wide range of mounting options. In a solitaire ring set, the stone’s size and intense color create a strong, focused presence that is refined yet bold, while in a halo setting the deep blue will be framed and accentuated by diamonds, producing a high contrast look that elevates formal evening wear. For pendants or brooches the oval outline provides classic symmetry that sits gracefully on the neckline or garment, and for bespoke pieces the mixed brilliant facet arrangement provides dynamic sparkle that complements both daytime and evening lighting conditions. Because of its excellent polish and stable enhancement history, this sapphire can be confidently paired with platinum, white gold, or yellow gold, depending on the desired aesthetic, and it will retain its beauty through routine wear when basic care practices are observed. At The Natural Sapphire Company we emphasize thoughtful disclosure and matching of stones to settings, and we are available to advise on ideal mounting styles, custom design considerations, and certification paths that support long term value and enjoyment.