Intriguing minerals: corundum in the world of rubies and sapphires with special attention to Macedonian rubies

Jeršek, Miha and Jovanovski, Gligor and Boev, Blazo and Makreski, Petre (2021) Intriguing minerals: corundum in the world of rubies and sapphires with special attention to Macedonian rubies. ChemTexts.

Text 2021_19 Jer_Jova_Boev_Makres Corundum.pdf Download (4MB)

Abstract

This lecture text presents features of the fascinating mineral corundum and its gem varieties, ruby and sapphire. The geologic occurrences of its varieties and the best-known world localities are presented in detail. The mineralogy and crystallography of corundum, as well as its occurrence forms, are discussed. The origin of their colour varieties and their usage are described, in addition to their important physical characteristics. Applications in the watch and laser industries and as an abrasive mate rial, among others, are included. The ruby variety from dolomite marble in North Macedonia exhibits the unique optical phenomenon known as diasporescence–the inclusion of diaspore crystals in the corundum matrix. This phenomenon afects the parting of corundum crystals and infuences their colour, density and hardness. Therefore, special attention is paid here to morphological and physical characteristics of the Macedonian gem corundum.

Item Type:	Article
Uncontrolled Keywords:	Corundum; Ruby; Sapphire; Diasporescence; Sivec; North Macedoniа
Subjects:	Natural sciences > Chemical sciences Natural sciences > Earth and related environmental sciences Natural sciences > Other natural sciences
Divisions:	Faculty of Natural and Technical Sciences
Depositing User:	Biljana Kosturanova
Date Deposited:	04 May 2021 10:03
Last Modified:	06 May 2021 06:21
URI:	https://eprints.ugd.edu.mk/id/eprint/28037

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