Hearts & Arrows viewer on Princess??
- Thread starter BlueSky3
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jet2ks
Ideal_Rock
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You can use a H&A viewer to see and rate aspects of cutting symmetry on an Princess, but it just doesn't look anything like H&A--it gives a nice shot of the chevrons, though. Infinity diamonds have pictures using this on their website. Go to either www.craftedbyinfinity.com or www.highperformancediamonds.com, search for a princess and take a look.
stone-cold11
Super_Ideal_Rock
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H&A scope can be used on princess cut to assess the optical symm of the stone but it will not show anything about the performance of the princess.
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A H&A-viewer is a standardized viewing environment, that makes it easier to judge the symmetry of a diamond. Since symmetry is a confusing term, I prefer to use the word ''precision'', since I also feel that the crispness of the patterns viewable in the viewer is an important indicator of the potential scintillation of the stone.
In a round stone, the viewer will show the well-known H&A-pattern. Because of the different facet-configuration of a princess, the pattern will be different. This makes it more difficult to judge. However, with a princess-cut being potentially much more asymmetrical than a round, I feel that the information offered by the standardized environment of the H&A-viewer is interesting.
Unfortunately, princess-cuts are very tricky beasts to photograph. This is true for H&A, Idealscope and ASET, and the possibility of comparing the various pics also increases the information-level.
Live long,
In a round stone, the viewer will show the well-known H&A-pattern. Because of the different facet-configuration of a princess, the pattern will be different. This makes it more difficult to judge. However, with a princess-cut being potentially much more asymmetrical than a round, I feel that the information offered by the standardized environment of the H&A-viewer is interesting.
Unfortunately, princess-cuts are very tricky beasts to photograph. This is true for H&A, Idealscope and ASET, and the possibility of comparing the various pics also increases the information-level.
Live long,
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A picture is worth a thousand words... Here are four images of the same Crafted by Infinity ideal princess cut diamond as seen through a Hearts & Arrows viewer; an Ideal Scope; and an ASET scope. Clearly each scope provides a different perspective of the precision that the diamond possesses. While the Gems Fantasy Scope was originally developed to enable people to view the H&A patterns found within certain round brilliant cut diamonds, it is definitely useful for judging the symmetry within princess cut diamonds of this caliber (but it will kill a princess cut diamond which has not been cut well)
stone-cold11
Super_Ideal_Rock
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GIA grading of symm.
http://www.gemology.ru/cut/english/symmetry/4.htm
It is physical symm, not how the facets are angled in relations to each other, which is optical symm.
http://www.gemology.ru/cut/english/symmetry/4.htm
It is physical symm, not how the facets are angled in relations to each other, which is optical symm.
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GIA grade physical symmetry, how well centred the diamond's table is, the culet etc. Optical symmetry is a totally different thing, this refers to the symmetry and patterning of the internal reflections of the stone due to top cutting precision which results in a crisp hearts and arrows pattern. So although a diamond might have excellent physical lab graded symmetry it doesn't necessarily follow it will have superior optical symmetry.
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