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 » RockyTalky
»  » Hearts and Arrows.
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Hearts and Arrows. |
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| P: 3/27/2005 1:05:31 PM | |
John and Gail Rough Rock Total Posts: 2 Last Post: 3/27/2005 Member Since: 3/27/2005 |
We are looking at purchasing a 1.07 carat diamond. It is EGL certified ideal. The color id D, VS2 in clarity, Polish, symmetry are excellent. The girdle is very thin. The diamond has .4 MM of variation in roundness. When looking at the arrows one must move your head around to see all of the arrows. All of the arrows can be viewed and they each look to have good alignment. What is the significance of needing to move one's head around to see the arrows? Regretably we did not turn the stone over to view the hearts. What should we look for? What is the best way to view for light leakage? Thanks 
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| Posted: 3/27/2005 1:05:31 PM | |
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There are 4 replies to this message. There are 4 replies on this page. |
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| P: 3/27/2005 2:01:35 PM | |
Paul-Antwerp Ideal Rock Total Posts: 1,902 Last Post: 11/20/2009 Member Since: 9/3/2002 |
Date: 3/27/2005 1  5:31 PMAuthor:John and Gail We are looking at purchasing a 1.07 carat diamond. It is EGL certified ideal. The color id D, VS2 in clarity, Polish, symmetry are excellent. The girdle is very thin. The diamond has .4 MM of variation in roundness. You need to check from which EGL-lab the grading report is. If EGL-USA, you can rely to some extent on the colour and clarity. As for the .4 MM-variation, I hope that that is a typo, and it truly is .04 MM. Otherwise, forget about this stone, unless you like your round to be somewhat like an oval. When looking at the arrows one must move your head around to see all of the arrows. All of the arrows can be viewed and they each look to have good alignment. What is the significance of needing to move one's head around to see the arrows? If you need to move your head around to view the arrows, then it is not a H&A-stone. What is the best way to view for light leakage? The easiest tool to view light leakage is the Idealscope. Final note: The very thin girdle is another matter of concern. Live long, Paul Slegers |
| Posted: 3/27/2005 2:01:35 PM | |
| P: 3/27/2005 2:14:36 PM | |
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John and Gail Rough Rock Total Posts: 2 Last Post: 3/27/2005 Member Since: 3/27/2005 |
Yes, the variation is .04MM The report did not mention EGL-USA, just EGL. Is the fact that the stone is not a hearts and arrow stone a bad thing? Why is a very thin girdle a concern? What is the difference between an ideal scope and that of the hearts and arrows viewer? Thanks John
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| Posted: 3/27/2005 2:14:36 PM | |
| P: 3/27/2005 2:24:01 PM | |
Lord Summerisle Ideal Rock Total Posts: 859 Last Post: 11/19/2009 Member Since: 12/14/2004 |
I believe that a Very Thin girdle can be more prone to damage than one with a thicker girdle like thin or medium. being a non H&A isnt a bad thing per se... just not something to be paying a premium for if it isnt present as a pattern. the differences between a H&A viewer and an Ideal Scope is the way light is used to view the diamond. in a H&A theres a colour filter and a the light is blocked so that only light from close to 20° (approx) either side of perpendicular is seen. this allows viewing of the patterning as white light return. the colour filter helps give constrast. An Ideal Scope uses light coming from behind the diamond to be reflected off a (normally) red filter, and light is blocked from above. This way, light which is reflected by the filter and sent back to the viewer is seen as red light, the blocked light from above is seen as back - to represent the head shadow between a i think 30° of perpendicular. and light which leaks out of the diamond is represented by white... There are better experts who could explain it better than me round these parts. but i hope that helps 
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| Posted: 3/27/2005 2:24:01 PM | |
| P: 3/27/2005 2:30:53 PM | |
denverappraiser Ideal Rock Total Posts: 4,614 Last Post: 11/22/2009 Member Since: 7/21/2004 |
The report did not mention EGL-USA, just EGL. EGL and EGL-USA are different companies. If it just says EGL, then it’s EGL. EGL uses the term ‘ideal’ rather differently than most other companies. Ask the seller what they mean by that term. If they don’t know (they probably won’t), ask EGL. There are stones that meet EGL’s rules that may not meet the AGS rules, for example. Is the fact that the stone is not a hearts and arrow stone a bad thing? Hearts & Arrows is a particular pattern that is visible in certain stones. It’s pretty popular but it’s not necessary. There are non-H&A stones that are just as lovely. If it’s not being sold as an H&A, and this isn’t something you’ve requested, I wouldn’t worry about it. Why is a very thin girdle a concern? Very thin girdles can be fragile. What is the difference between an ideal scope and that of the hearts and arrows viewer? An ideal-scope™ is a particular brand of tool used for viewing a diamond in a fairly specific lighting environment with the idea that you can make some conclusions about the light performance based on what you see. A h&a viewer is a tool used to see the h&a pattern within certain stones. H&A viewers can be supplied by a variety of different vendors while ideal-scopes are proprietary. Ideal-scope requires lighting from behind. H&A viewers require light from above and darkness behind. Neil Beaty There's never a crowd when you go that extra mile. |
| Posted: 3/27/2005 2:30:53 PM | |
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