摘要
玳瑁为非晶质体．主要成分为有机质，具美丽的斑纹，半透明至微透明，油脂至腊状光泽，韧性好。硬度为２．５，密度１．２９～１．３０ｇ／ｃｍ３，折光率１．５５．在紫外灯下较透亮的部分发微兰色荧光。遇高温颜色变暗，加热后变软，在热水中易于加工抛光．其市场行情越来越好。
Hawks-bill is an amorphous material. The tortoise consists mainly of organic materials, with beautiful mottle, semi-transparency, greasy-waxy luster and good pliability.Ithas a hardness of about 2.5 on Moh's scale, a specific gravity of 1.29-1.30g/cm3 and arefractive index of about1.55.Under the ultra-violet lamp, the brighter portions fluorescewith a bluish-white colour. When it meets high temperature, the colour of the shell tends todarkness and becomes soft in hot water. It is very easy to cut and polish. Hawks-bill plays anincreasingly noticeable role at the market.
出处
《桂林工学院学报》
1996年第3期286-290,T001,共6页
Journal of Guilin University of Technology
基金
国家自然科学基金
关键词
宝石学
玳瑁
有机物
gemmology, hawks-bill
organic material
specificity
