Identificação de quartzos incolores para joalheria
作者： Fernando Soares Lameiras , Eduardo Henrique Martins Nunes , Valéria Alves Rodrigues de Melo , Otávio Rocha Liz
DOI: 10.1590/S0370-44672006000100017
关键词: Optics 、 Analytical chemistry 、 Quartz 、 Chemistry
摘要: Colorless quartz are irradiated and heat-treated to become greenish, yellowish, brownish for the jewelry industry. Only a small fraction of natural, colorless can develop colors through this process. The identification is made irradiation heat-treatment tests on representative samples. samples sent irradiators then heat-treated. These not fast enough needs semiprecious dealers. A new test presented, that avoids heat-treatment. It identify with potential in few minutes. If portable infrared spectrophotometer available, it be performed field.
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