3.65 Ct. Blue Sapphire from Thailand

This 3.65 carat oval blue sapphire from Thailand, offered by The Natural Sapphire Company, is a gemstone that blends classic proportions with a strong, saturated blue that appeals to both connoisseurs and collectors. The gem measures 10.41 x 7.45 x 5.15 mm and is fashioned in an oval outline with a mixed brilliant cut, combining a faceted crown with a more pavilion oriented facet arrangement to maximize return of light and to balance color depth across the surface. Transparency is described as transparent, and the combination of dimensions and weight yields a comfortable face up presence without appearing too deep or shallow when set in jewelry. The excellent polish contributes to crisp facet junctions and a clean surface appearance, enhancing the gem's overall finish and providing lively reflections even with the stone's darker color intensity.

Clarity is graded as very slightly included as evaluated at eye level, which means that there are minor inclusions that do not significantly interfere with the gem’s visual appeal when viewed unaided. For an educated buyer this grade indicates a well balanced trade off between weight retention and visual cleanliness, particularly in sapphires where internal features may reflect the stone’s natural growth history. Inclusions in sapphires commonly take the form of tiny mineral crystals or feathery growth lines, and when present at this level they often contribute to a natural identity without compromising durability. The mixed brilliant cut on this oval piece is executed to enhance brilliance and to distribute color uniformly, so any minor inclusions are largely masked by facet reflections. The excellent polish further minimizes distractions along facet planes and supports crisp light return, which is especially important in a darker tone sapphire where surface finish has an outsized effect on perceived depth and richness.

Color is an essential component of sapphire valuation, and this gem is noted for its dark color intensity, presenting a deep, velvety blue that reads as rich and saturated in most lighting conditions. Heat treatment has been applied, which is a standard and widely accepted enhancement in the trade, used to improve color uniformity and to reduce the visibility of some internal features. Heat treatment in corundum is stable and permanent under normal wear conditions, and it is disclosed to ensure full transparency for buyers. Thailand is the reported origin, a source known for producing sapphires with strong, classic blues and a tendency toward fuller saturation. For the educated buyer, the combination of dark intensity, stable heat treatment, and origin provides a coherent account of how the gem’s appearance was achieved and what to expect in everyday viewing, from daylight to artificial indoor illumination.

Durability is an important practical consideration for any fine gemstone, and sapphire performs exceptionally well in daily wear situations. On the Mohs hardness scale sapphire ranks at 9, which is second only to diamond at 10, and comfortably harder than many common jewelry materials such as quartz at 7 and topaz at 8. This inherent hardness makes this 3.65 carat sapphire highly resistant to scratching and suitable for use in rings, pendants, and other items intended for frequent wear, though like all gemstones it should be protected from severe impact and from contact with harder materials. For care, warm soapy water and a soft brush are effective for routine cleaning, and most heat-treated sapphires tolerate ultrasonic cleaning, but any cleaning method should be chosen with awareness of the setting and any fractures or inclusions that may be present. For mounting, settings that showcase the oval face up area will highlight the rich blue tone, with prong or bezel styles offering different balances of exposure and protection. At The Natural Sapphire Company our specialists can advise on optimal settings, provide detailed disclosure about the gem’s treatment and origin, and suggest certification options to accompany purchase, ensuring that the technical attributes of this sapphire are fully understood and confidently represented in any finished piece.