blue vitriol

1. Blue vitriol, ie copper sulphate Alum will settle turbid water.
   胆矾（五水硫酸铜）.明矾可以澄清浊水。
2. A pear-shaped synthetic sapphire, ruby, or other alumina-based gem, produced by fusing and tinting alumina. blue vitriol, ie copper sulphate
   人造宝石一种通过将铝熔化和染色而制成的梨形合成蓝宝石、红宝石或其它矾土宝石
3. Simply, the hydrate is a compound containing water molecules and secondary school textbooks mentioned on the alum, gypsum, and blue vitriol, are the most famous hydrate.
   简单地来说，水合物是含有水分子的化合物，中学课本上提到的明矾、石膏和蓝矾等，都是最著名的水合物。

noun

1. hydrated blue crystalline form of copper sulfate

   Synonym:    blue copperasblue stonechalcanthite