This vintage book contains a complete guide to testing gems and gemstones for purity and authenticity.

This book contains the texts of the lectures which were givenat the Nato Advanced Study Institute on Advanced Heat Pumns which was heldat Espinho, Portugal in September 1980.

Anderson and his lifelong colleague, Payne, both of the world's first full-time gemmological laboratory, were the pioneers in recognizing the vast potential of the spectroscope, and The Spectroscope and Gemmology is the extensively edited, ...

Such a treaty, she says in this new work, has little credible economic rationale but could have potentially dangerous effects on our ability to decide for ourselves how we address the economic, environmental, social and Treaty challenges of ...

Learn how to program with Python from beginning to end. This book is for beginners who want to get up to speed quickly and become intermediate programmers fast!

Viscous computational fluid dynamic simulations were used to predict the aerodynamic coefficients and flowfield around a generic canard-controlled missile configuration in supersonic flow.

This book is the product of self-supported and painstaking research work of 47 experiments on 30,000 natural and synthetic rubies and sapphires treated with beryllium by Ted Themelis in his thermochemical GEMLAB laboratory in Bangkok from ...