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Originally Posted by Richard W. Wise Bill,
Nicely laid out system not too different from Gemology Tools. I notice that your system (thus far) only takes round pearls and strands into consideration.
How would you grade individual pearls for shape, i.e. button, pears, drops, etc. Would you discount anything not round? |
Hi Richard,
The system is used to grade individual pearls as well as strands, using the three factors of Shape, Luster and Surface. Matching only applies to strands, or perhaps a pair of earrings.
I had not considered that Button should have a category – thanks for pointing that out.
Although, technically, Button is not Symmetrical, it could be placed into the Oval category, as long as the pearl is a true button and not distorted in shape. If the shape were distorted enough, it would drop down into the Semi-Baroque category. Temporarily, I’ve added Button next to Oval.
However, to be more correct, it may be better to add a Category of Button between Symmetrical and Semi-Baroque.
For the time being, I’ve modified the text to show Oval and Button in the Symmetrical category, and will leave it open for discussion purposes to see if it should stay there, or have its own category. All comments on where Button should be placed are appreciated.
Drop and Pear of course have their own category.
Any pearl in the Symmetrical category --Button, potato, rice, drop and pear -- which are graded A, would drop down into the Semi-Baroque category for a grade B, if the shape is distorted enough.
Thanks for your comments
Bill
PS. I looked at your book and it looks interesting. Next spring I hope to have time to take GIA's AJP course, and I'll probably buy your book at that time. I don't have the time to devote to the study right now.