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Gemstone Faceting - Are you buying worthless gems?
Автор: Vintage Time
Загружено: 2019-05-26
Просмотров: 19918
Описание:
A insiders guide to gemstones that should never be faceted or bought. Buyers should be aware that certain synthetic gems have no intrinsic value. And gem cutters should be mindful of faceting certain material that can be harmful to their health.
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