没有保留价 - 1 pcs 钻石 (天然) - 1.20 ct - 方形 - D (无色) - VS1 轻微内含一级 - 美国宝石研究院（GIA）

1.20 ct 天然钻石 – GIA 证书 | D 色 | VS1 明确度 | Asscher Cut（方形祖母绿切割） | 无底价

Presented for auction without reserve is an exceptional 1.20 Carat Natural Diamond, accompanied by a prestigious GIA Diamond Grading Report, the world's most respected authority for diamond certification.

This remarkable diamond combines an exceptional D Color, a premium VS1 clarity, and one of the most sophisticated and collectible diamond shapes ever created: the Asscher Cut.

While GIA officially describes the cutting style as Square Emerald Cut, this is the technical grading terminology used by GIA. In the jewellery trade and among collectors, this shape is universally recognised as an Asscher Cut—a square step-cut diamond with cropped corners, renowned for its geometric precision and mesmerizing optical performance.

为何 Asscher Cut 特别
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Unlike brilliant-cut diamonds that produce thousands of tiny flashes of sparkle, an Asscher cut belongs to the step-cut family, where long, parallel facets act like mirrors.

Rather than creating pinfire scintillation, an Asscher cut produces broad beams of white light that travel through the diamond from every direction. As the stone moves, these beams appear to flow across the entire diamond, creating an elegant and unmistakable display of light appreciated by connoisseurs worldwide.

Two optical effects make the Asscher cut legendary:

Hall of Mirrors Effect
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The perfectly aligned step facets create a remarkable optical illusion known as the Hall of Mirrors. Looking into the diamond reveals an endless series of reflective geometric patterns, giving the impression of infinite depth and exceptional transparency.

Windmill Effect
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Viewed face-up, the pavilion facets converge toward the centre to form the famous Windmill Effect—a striking symmetrical pattern that resembles four blades radiating from the centre of the diamond. This optical phenomenon is unique to high-quality Asscher cuts and is considered one of the defining characteristics sought by collectors.

These architectural light patterns are impossible to replicate in brilliant-cut diamonds and are the reason Asscher diamonds have remained among the most prestigious diamond cuts for more than a century.

Asscher Cut vs. Emerald Cut
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Although both belong to the step-cut family, there are important distinctions:

Asscher Cut

Square proportions with cut corners
Higher crown and deeper pavilion
More concentric step facets
Famous Hall of Mirrors and Windmill Effect
Produces dramatic beams of light and exceptional depth
Vintage Art Deco elegance with remarkable symmetry

Emerald Cut

Rectangular outline
Longer, more elongated appearance
Larger open table
Elegant flashes of light rather than a central windmill pattern
Appreciated for its clean lines and understated sophistication

Collectors often regard the Asscher cut as the more technically demanding square version of the emerald cut because its symmetry and optical precision are immediately visible.

Exceptional D Color
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One of the diamond's most outstanding characteristics is its D Color, the highest possible grade on the GIA color scale.

Only a very small percentage of natural diamonds achieve this elite classification. A D-color diamond is completely colorless, displaying an icy-white appearance with extraordinary brightness and transparency. It represents the pinnacle of diamond color and is highly sought after by collectors, investors, and buyers seeking the finest quality gemstones.