指矿物表面反射可见光的能力。根据平滑表面反光的由强而弱分为金属光泽(状若镀克罗米金属表面的反光,如方铅矿)﹑半金属光泽(状若一般金属表面的反光,如磁铁矿)﹑金刚光泽(状若钻石的反光,如金刚石)和玻璃光泽(状若玻璃板的反光,如石英)四级。金属和半金属光泽的矿物条痕一般为深色,金刚或玻璃光泽的矿物条痕为浅色或白色。此外,若矿物的反光面不平滑或呈集合体时,还可出现油脂光泽﹑树脂光泽﹑蜡状光泽﹑土状光泽及丝绢光泽和珍珠光泽等特殊光泽类型。
指矿物透过可见光的程度。影响矿物透明度的外在因素(如厚度﹑含有包裹体﹑表面不平滑等)很多。通常是在厚为0.03毫米薄片的条件下,根据矿物透明的程度,将矿物分为:透明矿物(如石英)﹑半透明矿物(如辰砂)和不透明矿物(如磁铁矿)。许多在手标本上看来并不透明的矿物,实际上都属于透明矿物如普通辉石等。一般具玻璃光泽的矿物均为透明矿物,显金属或半金属光泽的为不透明矿物,具金刚光泽的则为透明或半透明矿物。
The ability to reflect visible light on the surface of minerals. According to the smooth surface reflective by strong and weak metal luster (like if plating chromium metal surface reflection, such as galena), semi metallic luster (like if general metal surface reflective, such as magnetite), adamantine luster (like if diamond reflective, such as diamond) and glass luster (like if plate glass reflective, such as quartz) four level. Metallic and semi metallic mineral streak is generally dark, diamond or glassy mineral streak as light or white. In addition, if the reflective surface of the mineral is not smooth or a combination, it can also appear the oil sheen, resin luster, waxy luster, earth like luster and silky luster and pearl luster, etc..
指矿物透过可见光的程度。影响矿物透明度的外在因素(如厚度﹑含有包裹体﹑表面不平滑等)很多。通常是在厚为0.03毫米薄片的条件下,根据矿物透明的程度,将矿物分为:透明矿物(如石英)﹑半透明矿物(如辰砂)和不透明矿物(如磁铁矿)。许多在手标本上看来并不透明的矿物,实际上都属于透明矿物如普通辉石等。一般具玻璃光泽的矿物均为透明矿物,显金属或半金属光泽的为不透明矿物,具金刚光泽的则为透明或半透明矿物。
The extent to which the mineral is visible through visible light. External factors (such as thickness, inclusion, surface roughness, etc.) that affect mineral transparency are many. Is usually in the thick to 0.03 mm slice conditions, depending on the degree of transparent minerals, mineral into: transparent minerals (such as quartz), translucent minerals (such as cinnabar) and opaque minerals such as magnetite. Many of the minerals in the hands of the specimen are not transparent, in fact, are transparent minerals such as ordinary. Generally with a glass luster of the minerals are transparent minerals, metallic or semi metallic luster for opaque minerals, with a king of the transparent or translucent mineral.