三方晶系 meaning in English
rhombohedral crystal system
trigonal system
Examples
- Alpha alumina trigonal system
三方晶系 - There are slight variations in the red color , depending on quality and the location origin , but the most valuable rubies are a vivid red color with a slight blue undertone
最初使用时，这一词表示天青石和其它不透明的蓝色矿物。蓝宝石属于刚玉族矿物，三方晶系。 - One grade of black tourmalines of craft , the surface is smooth and glossy , the fracture is pitch - black , flawless , the hardness is high , cut , polish , throw and grind and make the ornament , necklace , pendant , inlaying and give up the best material of taxi
电气石的化学通式为nar3al6 si6o18 bo3 3 oh , f 4 ，晶体属三方晶系的一族环状结构硅酸盐矿物的总称。 - There are slight variations in the red color , depending on quality and the location origin , but the most valuable rubies are a vivid red color with a slight blue undertone . these highest quality rubies are called pigeon blood , and usually come from burma
最初使用时，这一词表示天青石和其它不透明的蓝色矿物。蓝宝石属于刚玉族矿物，三方晶系。宝石界将红宝石之外的各色宝石级刚玉都称为蓝宝石。