corundum, synthetic corundum.7, gems

Birău, Ciuhandu and Vangheli present a comprehensive Romanian-language treatment of ruby and sapphire as gem varieties of corundum. The book places particular emphasis on the crystallography and crystal structure of corundum, including its investigation by X-ray methods, while also treating the mineralogical and gemological properties of ruby and sapphire. Tables, diagrams, experimental methods and analytical techniques accompany the text. A contemporary Journal of Gemmology review describes it as an “exhaustive treatise” on ruby and sapphire, specifically noting its detailed treatment of crystal structure and its extensive bibliography.