Elliptical Gemstone Facet Arrangement Reduces Shadowing
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Solution Overview
Problem
Conventional fancy shape gemstones face challenges in achieving both desirable brilliance and enhanced natural color due to increased shadowing, particularly those with non-circular shapes, which reduces their sparkle and brilliance.
Innovation Solution
A gemstone design featuring an elliptical cross-section with specific facet arrangements, including a girdle, crown, and pavilion, where facets are cut at precise angles to minimize shadowing and maximize light reflection, comprising a table, star facets, intermediate crown facets, main crown facets, girdle facets, culet-adjacent facets, candle facets, and main pavilion facets, optimized to enhance brilliance and color appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional fancy shape gemstones are cut with non-circular cross-sections, then the gemstone achieves a desirable shape and enhanced natural color, but internal shadowing increases which reduces brilliance and sparkle
Solution Approach 1:
The gemstone is divided into multiple precisely angled facets (table, star facets, upper intermediate crown facets, lower intermediate crown facets, main crown facets, upper girdle facets, main pavilion facets, lower girdle facets, candle facets, and culet-adjacent facets) that segment light paths to eliminate shadowing while maintaining fancy shape
Solution Approach 2:
Different regions of the gemstone have locally optimized facet configurations - the crown portion has star facets and intermediate crown facets arranged to maximize brilliance, while the pavilion portion has main pavilion facets and candle facets configured to enhance color and eliminate internal shadows
2Ease of manufacture
If conventional fancy shape gemstones are cut, then the gemstone achieves enhanced natural color, but shadowing reduces the sparkle and brilliance
Solution Approach 1:
The facet configurations convert potentially harmful shadowing effects into beneficial light reflection patterns - the precisely angled facets redirect light paths to eliminate shadows while enhancing both color and brilliance simultaneously
3Illumination intensity
If facets are cut at specific angles to maximize brilliance, then sparkle is improved, but the ability to enhance natural color is compromised
Solution Approach 1:
The patent employs multiple sets of facets with different angle parameters - crown facets with angles optimized for brilliance and sparkle, and pavilion facets with angles optimized for color enhancement - allowing both objectives to be achieved simultaneously through parameter optimization
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design significantly reduces internal shadowing, thereby improving the gemstone's brilliance, sparkle, and overall performance by increasing total depth and depth percentages, allowing for a flower-shaped light reflection typically only achievable in round gemstones.
Implementation Method 1
facets are cut at precise angles to minimize shadowing and maximize light reflection
Implementation Method 2
facets are cut at precise angles to minimize shadowing and maximize light reflection
Data Source
AI summary
A gemstone includes a crown, a pavilion, and a girdle disposed between the crown and the pavilion. The girdle has an elliptical-shaped cross-section with first and second pointed ends. The surface of the gemstone is generally divided into a number of groups of interlocking facets disposed at a variety of angles. The groups of facets comprising the surface of the crown generally include star facets, upper intermediate crown facets, lower intermediate crown facets, main crown facets, and upper girdle facets. The upper girdle facets generally abut an upper edge of the girdle. The groups of facets comprising the surface of the pavilion include culet-adjacent facets, candle facets, main pavilion facets, and lower girdle facets. The lower girdle facets generally abut a lower edge of the girdle.