事实上，真正的红宝石是红色刚玉族矿物。
True rubies are, in fact, the red variety of a mineral called corundum.
作为一种珍贵的宝石，红宝石是一种红色的矿物刚玉。
Rubies, valued as precious gems, are the mineral corundum in its red form.
红宝石是对红色矿物刚玉的俗称，它是一种珍贵的宝石。
Ruby, the common name for the mineral corundum in its red form, is a precious gemstone.
只有红色的刚玉可称为红宝石，其他任何颜色是命名为蓝宝石。
Only red corundum is entitled to be called ruby, all other colours being classified as sapphires.
无论如何，粉红色的刚玉是最迷人美丽的宝石之一。
Either way, these gems are among the most beautiful of the corundum family.
在陶瓷结合剂白刚玉磨具结合剂中加入滑石粉、石英粉、氧化镁粉，能消除白刚玉磨具呈红色，但对磨具强度有影响。
Addition of the powders of talc, quartz and magnesium oxide to vilified bond, red color of white alumina abrasives can be avoid, but in the meanwhile the strength of the abrasives can be influenced.
冀东某地原生刚玉矿床具有埋藏浅，刚玉个体大、微红至暗红色、半透明至不透明等特点，经人工改善可生产低档红宝石。
The primary corundum deposit in eastern Hebei is near the ground surface. The corundum is megacrysts, pink or dark red color, semi-transparence to opaque.
冀东某地原生刚玉矿床具有埋藏浅，刚玉个体大、微红至暗红色、半透明至不透明等特点，经人工改善可生产低档红宝石。
The primary corundum deposit in eastern Hebei is near the ground surface. The corundum is megacrysts, pink or dark red color, semi-transparence to opaque.
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