4.11 Ct. Greenish Blue Sapphire from Australia

This transparent, GIA certified greenish blue sapphire presents a 4.11 carat weight in an asscher octagon outline, with exact dimensions of 8.63 by 7.97 by 6.12 millimeters. The stone exhibits an intense color intensity and is described as greenish blue, a hue that reads as balanced between verdant and oceanic tones depending on lighting and mounting. Clarity is graded as eye clean at typical viewing distances, indicating no inclusions visible to the unaided eye, and the gem has an excellent polish, creating crisp facet junctions and well defined reflections. The stone has been heat treated, a commonly practiced and stable enhancement for sapphires that improves color saturation and can reduce the visibility of internal features, and the origin is Australia. Based on the supplied proportions the depth of the sapphire measures 6.12 millimeters relative to the average of the length and width, yielding a depth percentage of approximately 73.7 percent, a dimension that contributes to the gem s weight and also influences perceived color saturation and light return.

The asscher cut, with its step faceting and octagonal outline, emphasizes transparency, color uniformity, and clarity, producing a hall of mirrors effect that displays broad flashes and planar reflections rather than a profusion of pinpoint brilliance. For a transparent, intensely colored sapphire of this size and quality, the asscher geometry highlights the stone s color saturation and internal character, allowing the eye clean clarity and excellent polish to read as clean, elegant planes of color. The octagon form and cropped corners inherent to the asscher silhouette also make this sapphire suitable for a variety of settings, as the profile maintains a classic, architectural presence on the finger or in a pendant. Because the gem is GIA certified, the presented attributes are accompanied by independent laboratory verification, providing clarity on weight, dimensions, cut style, treatment, and identity.

In terms of durability, sapphire is a variety of corundum with a Mohs hardness of 9, placing it immediately beneath diamond, which has a Mohs hardness of 10. This hardness gives sapphire strong resistance to scratching from common materials and makes it suitable for everyday wear, including rings and other jewelry that experience regular surface contact. For context, quartz and amethyst register at 7 on the Mohs scale, topaz at 8, and emeralds generally fall between 7.5 and 8 but are often more vulnerable in practice due to inclusions and internal fissures. While corundum exhibits excellent surface hardness, it is not immune to chipping from sharp, directional impacts, particularly at facet junctions or corners, so protective mounting techniques are advisable. For an asscher cut with its angled corners, settings that guard the corners such as bezels or prongs with corner protection will preserve the integrity of the stone in daily wear. Heat treated sapphires like this example are stable to routine cleaning, and gentle ultrasonic or steam cleaning is typically acceptable provided there are no additional fillings, yet care with harsh chemicals and severe blows remains prudent. The Natural Sapphire Company provides full documentation and support for this GIA certified sapphire, and the combination of eye clean clarity, intense greenish blue color, asscher cut, and corundum hardness make this gem appropriate for use as a central stone in a variety of jewelry applications where both aesthetic presence and practical durability are required.