Gemstone Crown Angle Adjustment for Brilliance
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Solution Overview
Problem
Conventional diamond cutting methods prioritize carat weight over brilliance, resulting in gemstones with less than ideal crown brightness, as they fail to effectively reflect light from the crown area, leading to a less valuable and desirable product.
Innovation Solution
The method involves adjusting the crown angle to less than the conventional 34.5°, expanding the crown to guide light and enhance brilliance, while maintaining the gemstone's diameter, allowing for more brilliant and proportionate cuts, even in smaller sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the crown angle is reduced to less than 34.5°, then the brilliance of the crown area is improved, but the carat weight of the gemstone is reduced
Solution Approach 1:
The patent changes the crown angle parameter from the conventional 34.5° to less than 34.5° (specifically 10°-30°), which fundamentally alters the light reflection geometry. This parameter change enables light to reflect from the pavilion back to the crown area, dramatically improving crown brilliance while accepting a trade-off in carat weight that is offset by the enhanced visual appeal and perceived value of the gemstone.
2Illumination intensity
If the crown angle is reduced to less than 34.5°, then light reflection in the crown area is improved, but the conventional cutting proportions are compromised
Solution Approach 1:
The patent systematically changes multiple geometric parameters beyond just the crown angle. It specifies a pavilion angle range of 37°-45°, a depth percentage range of 40%-70%, and a table size range of 40%-60% of diameter. These coordinated parameter changes create a new set of optimal proportions that differ from conventional standards but achieve superior crown brilliance through the modified light reflection geometry.
3Illumination intensity
If the crown is expanded to guide light, then the brilliance is enhanced, but the gemstone diameter is constrained
Solution Approach 1:
Instead of expanding the crown horizontally (which would increase diameter), the patent achieves crown expansion in a different dimension by lowering the crown angle. This creates a more pronounced crown structure that extends downward rather than outward, allowing the crown to occupy more three-dimensional space and effectively guide light without increasing the gemstone's diameter footprint.
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
This approach increases the brilliance of the crown area, making the gemstone appear larger than its actual carat weight, improves color and clarity grading, and enables the production of higher quality gemstones from rough materials, addressing the limitations of traditional cutting techniques.
Implementation Method 1
light entering the crown or table of the gemstone and reflecting back out through the top or crown of the gemstone as dispersed light
Implementation Method 2
External brilliance generally refers to the amount of light reflected from the table or outer surface of the diamond
Data Source
AI summary
A gemstone is provided that has an improved brilliance, especially at the crown portion of the gemstone. The gemstone has a crown angle that is less than an ideal cut round diamond and, preferably the crown angle is less than 27 degrees. By reducing the crown angle of the gemstone, light entering one end of the crown portion may exit the opposite end of the gemstone. In addition, reducing the crown angle reduces the mass necessary for the gemstone. As a result, the gemstone has a width or diameter that corresponds to a larger mass gemstone that is cut according to conventional ideal proportions.