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this scale offers a fine readability of 0
which will teach you how to judge a quality diamond
A very comprehensive look at all things diamond
and various jewellery alloys
Blue Chalcedony
Tables of Gemstone Identification - Birgit Günther pickup-only this scale offers a fineMore than 25 years of international use have established these Tables as an effective tool in the identification of gemstones, synthetics and imitations and therefore the presentation and layout have remained unchanged. Nevertheless, the content has been partially reworked and updated to include the following new items: Stones previously given in the Supplement to the Tables (1991) have now been listed in this edition in their appropriate order of