The Complete Handbook for Gemstone Weight Estimation. Gemstone Weight Estimation Handbook 2019-01-10

The Complete Handbook for Gemstone Weight Estimation Rating: 7,9/10 680 reviews

Gemstone Weight Estimation Handbook

The Complete Handbook for Gemstone Weight Estimation

However, the pink tourmalines I see there don't look very included. The appraisal just came back. Determination of identity and other data is based on the chemical and physical properties and internal characteristics, using magnification, standardized viewing environment and light source, standard and or advanced gemological instruments as deemed necessary. Leonid Surpin Powered by , best viewed with JavaScript enabled. Whatever you decide, I hope it goes well for you.

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The complete handbook for gemstone weight estimation (1998 edition)

The Complete Handbook for Gemstone Weight Estimation

Carmona thoroughly understands the trial process and how to anticipate a line of questioning during cross examination. Formula works fine as long as it is ideal cut. Gemstone Weight Estimation This thoroughly comprehensive manual does the difficult task of estimating carat weights of mounted gemstones, calculated by their dimensions and shape, with over 300 pages of tables listed, and gemstone type. Jon, Regarding your question: Has anyone developed a weight estimation formula for mounted princess cut diamonds? I'm wondering if the ring is worth the cost of that it's not something I'm set up for, and I've never removed stones, only set them. Carmona delivers critical support to his clients at each stage of a legal dispute, from fact-finding and discovery to settlement or trial.

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美国GUILD宝石实验室_ABOUT THE GUILD

The Complete Handbook for Gemstone Weight Estimation

I could try to get a scan, though. Those are much easier to weigh. Opinions may vary in terms of characteristics covered in this report, and results of the examination may differ upon i when, how and by whom the article is examined ii changes and improvements in technology and equipment that enable the lab to detect, among other things, treatments previously undetectable, or alterations which becomes reversible, even if the process remains undetectable. This handbook is available through various book sellers' online outlets. So I thought of putting it on eBay, since a friend of mine is doing that now.

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Gemstone Weight Estimation Handbook

The Complete Handbook for Gemstone Weight Estimation

Carmona's contributions are key to determining financial damages in complex litigation, criminal matters, insurance claims, class actions and other disputes. Yes, Charles Carmona of Guild Labs has not only developed formulas for all sort of diamond shapes and cuts but also for those of colored gems. He is frequently retained to provide advice in legal proceedings requiring specialized knowledge of industry practices and the valuation of jewelry, diamonds, gemstones, coins and currency, silver and related personal property. Carmona thoroughly understands the trial process and how to anticipate a line of questioning during cross examination. Shape modifier for princess is 0. Conclusion on the identity and treatments of gemstones is an opinion of the labora tory based on the direct comparison of the findings with those obtained from the analysis of reference materials, as well as those in published literature obtainable at the time of examination. And everybody seems to list carat weight for their stones.

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Expert Witness

The Complete Handbook for Gemstone Weight Estimation

If you spend much time on eBay, you will find that gemstone auction photos are often only representative of what they are selling, and not the actual stone. His professional opinions are frequently sought out by the media, and he's an oft invited speaker at special events, museum groups, at workshops and trade shows. There are formulae to estimate gemstone weights by measurements and specific gravity, but there are other factors, such as estimating girdle thickness which require some experience. Carmona delivers critical support to his clients at each stage of a legal dispute, from fact-finding and discovery to settlement or trial. Pavilion bulges, thick girdles, extra large culets, and etc. This report contains a record of the physical data of the tested items, including nature of the stone, identity, treatments and alterations made to the stone, as applicable.

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Gemstone Weight Estimation Handbook

The Complete Handbook for Gemstone Weight Estimation

If the gemologist you used did in fact use these descriptions in his appraisal I might be a little skeptical of everything else he wrote. The 434 page resource is an essential asset for jewelry professionals of all kinds and will be referred to often when calculating the carat weight of mounted goods for conducting jewelry appraisals, matching stones for duplicating a jewelry design and countless other applications. There is an instrument called a Leveridge Gauge, which is basically a micrometer which has been modified to make it easy to use on mounted diamonds. It is perfectly ethical to advertise your ring by the outline measurements of the stones, i. His highly acclaimed reference book, The Complete Handbook for Gemstone Weight Estimation is relied upon worldwide by jewelry professionals as the authoritative source for estimating mounted gemstone weights by shape, dimension and specific gravity.


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Gemstone Weight Estimation Handbook

The Complete Handbook for Gemstone Weight Estimation

His professional opinions are frequently sought out by the media, and he's an oft invited speaker at special events, museum groups, at workshops and trade shows. The laboratory may refuse the issuance of a certificates at any time. An expert valuation specialist, Mr. Carmona's experience and credentials by calling 213-624-0137 or email: cicarmona gmail. I'm assuming that, to get carat weight, the faceted, but bezel-set tourmaline, and one of the surrounding sapphires, would have to be removed, and then re-set am I right? He is frequently retained to provide advice in legal proceedings requiring specialized knowledge of industry practices and the valuation of jewelry, watches, diamonds, gemstones, coins and currency, silver and related personal property. Carmona has earned an exemplary reputation as an impartial expert witness, assisting both plaintiffs and defendants. You mentioned that you were looking at stones on eBay, not necessarily finished jewelry.

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Digital Pocket Gemstone Gauge

The Complete Handbook for Gemstone Weight Estimation

And everybody seems to list carat weight for their stones. Methods for estimation gemstone weight had been known for many years. But you may also purchase this guide in volume or request autographed copies directly from Guild Laboratories by. His services include expert witness testimony, reports, critiques of opposing expert opinions, and consultation during discovery and fact-finding. And forgive me if I take a while to get back to you. An expert valuation specialist, Mr.

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美国GUILD宝石实验室_ABOUT THE GUILD

The Complete Handbook for Gemstone Weight Estimation

See our page to review our complete schedule offered at Guild Laboratories. This thoroughly comprehensive manual does the difficult task of estimating carat weights of mounted gemstones, calculated by their dimensions and shape, with over 300 pages of tables listed and gemstone type. Carmona has earned an exemplary reputation as an impartial expert witness, assisting both plaintiffs and defendants. The appraisal just came back. The handbook's organization, and easy to read content have made the book an industry standard. Using my funky brass calipers, I get 8 x 10 mm for the tourmaline and 3.

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The Complete Handbook for Weight Estimation by: Charles I. Carmona, G.G.

The Complete Handbook for Gemstone Weight Estimation

. So I thought of putting it on eBay, since a friend of mine is doing that now. He exhibits acute awareness of nonverbal cues like facial expressions, gestures, posture and eye contact, and how they contribute to juror perception. I suspect he was trying to impress you with vocabulary. Any deviations from correct proportions has to be accounted in correction factor.

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