1.70 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent blue sapphire weighs 1.70 carats, and it is fashioned into a classic emerald cut that measures 7.95 by 5.39 by 4.00 millimeters, with proportions that emphasize a broad, clean table and long step facets. The stone presents an intense color intensity and an excellent polish that contribute to a vivid visual presence, and it has been evaluated as eye clean at normal viewing distance, meaning no inclusions are visible to the unaided eye. This sapphire is heat treated as a standard enhancement to improve color uniformity and clarity, and its origin is Ceylon Sri Lanka, a source long esteemed for producing sapphires with lively, saturated blues. The combination of weight, cut, and polish makes this gem an ideal candidate for a refined solitaire ring or a bespoke setting where the stone can be admired face up, and the emerald cut provides an elegant, architectural look that suits modern and traditional designs alike.

From a grading perspective, the most important attributes for a colored stone are color, clarity, cut, and origin, and this sapphire scores highly across those categories. Its intense color intensity places it within the more desirable range for blue sapphires, providing depth without appearing overly dark, and the eye clean clarity grade increases both its aesthetic appeal and its market value because unobstructed light travel within the stone optimizes its color and brilliance. The emerald cut is a step cut that produces broad flashes of color and defined light and dark planes, rather than the dispersed sparkle associated with brilliant cuts, and the excellent polish on every facet ensures crisp facet junctions and smooth surfaces that maximize light return. The heat treatment is a widely accepted and stable enhancement in the trade, applied to enhance both saturation and clarity, and when disclosed honestly as it is here, it does not detract from the integrity or long term durability of the gem.

When comparing the brilliance and visual character of this sapphire to more common gemstones, it is useful to consider both optical properties and practical wearability. Diamonds are renowned for their high dispersion and intense fire, and they will typically display more scintillation under mixed lighting, however their colorless quality means they do not offer the saturated, enveloping hue that defines a fine sapphire. Blue topaz and aquamarine often present lighter, more pastel tones, and while they can exhibit good luster and sparkle, they lack the deep saturation and dimensional color that a Ceylon sapphire offers. Sapphires have a higher refractive index than many other common colored stones, and combined with the strong color saturation of this specimen, the result is a gem that commands presence through rich color glow and defined internal flashes rather than through high dispersion alone. Additionally, sapphire ranks nine on the Mohs hardness scale, which means it is exceptional for everyday wear, resisting scratches better than many other colored gems, and preserving polish and facet integrity over time.

For the educated buyer considering both beauty and provenance, this emerald cut Ceylon blue sapphire represents a compelling balance of aesthetics, durability, and transparency in treatment. The origin Ceylon Sri Lanka imparts a historical and market significance because stones from that region are often associated with lively cornflower to deep royal blue tones, and the disclosed heat treatment aligns with industry norms that enhance gem quality while retaining natural origin value. The eye clean clarity and excellent polish increase its suitability for fine jewelry designs, and the dimensions and carat weight make it versatile for engagement rings, pendants, or as the centerpiece of custom creations. At The Natural Sapphire Company we provide full disclosure and detailed reports to support confident purchasing decisions, and we can advise on complementary settings and mounting styles that will showcase the emerald cut while protecting the girdle and corners. Proper care involves routine cleaning with mild soap and water and occasional professional inspection of the setting, and with responsible wear this sapphire will maintain its striking color and form for generations, making it both a beautiful adornment and a potential long term asset.