论文部分内容阅读
江苏六合原生蓝宝石赋存在新生代玄武岩古火山口管道相岩石中,经过风化剥蚀,在古火山口周围形成蓝宝石砂矿。本区宝石颜色多为深色,透明度差,多数难以直接利用。一年多来,我们对一些蓝宝石样品进行人工处理,获得了较好的改色效果。一、影响蓝宝石颜色和透明度的因素六合蓝宝石以蓝色为主,包括深蓝、蓝黑、浅蓝和蓝灰色,其次为棕褐色、灰绿色、黄绿色。颜色指数测定结果表明,以篮色为主的宝石,主波长在473～483nm 之间,Z 刺激值较高;绿色宝石主波长在567nm 左右,Y 刺激值偏高;棕褐色宝石主波长在580nm 左右,X 刺激值较高。透明宝石三刺激值高,半透明次之,而不透明宝石三刺激值较低。蓝色宝石三刺激值相对差值大,说明其颜色纯度高;而褐色、黄绿色宝石三刺激值相对差值很小,颜色纯
In the Cenozoic basaltic ancient crater pipe facies rocks, the primary natural sapphire of Liuhe, Jiangsu Province was deposited and weathered sands and sapphire sands were formed around the ancient crater. Most of the area gem color is dark, poor transparency, most difficult to use directly. For more than a year, we have processed some sapphire samples and obtained good color-changing effects. First, the factors that affect the color and transparency of sapphire Liuhe sapphires are mainly blue, including dark blue, blue and black, light blue and blue-gray, followed by brown, gray-green, yellow-green. The result of color index shows that the main color of the gemstone is blue with the main wavelength is 473 ~ 483nm, and the Z stimulus is higher; the main wavelength of the green gem is about 567nm, the Y stimulus is higher; the main wavelength of the tan gem is 580nm X-stimulus is higher. Transparent gemstones tristimulus value, translucent second, and opaque gemstones tristimulus value is low. Blue gems tristimulus relative difference between the large, indicating its high color purity; and brown, yellow-green gemstones tristimulus values relative difference is small, pure color