has for decades been recognised as the standard work for those learning how to identify gems and ornamental minerals. It is recommended by educational authorities as a course textbook; it is also particularly suitable as a self-instructor for those entering or hoping to advance in the jewellery and gem trades, or for the keen amateur. The twenty-one sections comprise notes on the formation of gem materials and an additional chapter on the chemistry of gemstones. A section on luminescence and electrical effects that brings a more modern approach to this part of the subject. More information is given on the inclusions seen in gemstones and the newer synthetic stones are discussed. Increased coverage is given to the types of modern methods of colouring diamonds artificially. The methods used in cutting gemstones and details of more of the unusual gemstones now cut and polished are also discussed.
By:
Robert Webster Imprint: Nag Press Country of Publication: United Kingdom Edition: 4th Revised edition Dimensions:
Height: 190mm,
Width: 130mm,
Spine: 22mm
Weight: 299g ISBN:9780719800115 ISBN 10: 0719800110 Pages: 209 Publication Date:31 December 1966 Audience:
General/trade
,
ELT Advanced
Format:Other merchandise Publisher's Status: Active