The advantages of impurities

  Us Chemists are a strange bunch. We like things pure. Purity is good. If something is pure we know what we have. We like this! On the other-hand, we like impurities. It is why we put salt in our water when we boil potatoes. The salt is an impurity and it increases the boiling point of water. The water can reach a higher temperature before boiling and our potatoes cook faster. This article will focus on beryllium oxide being used as an ...

Gemstones

  Gemstones are all broadly fromed in the same way - a liquid containing dissolved chemicals cools and crystals grow! However, the devil is in the detail..... ....Firstly, extreme pressure is also needed. Gemstones are rare becuae the correct chemicals need to be present in large enough quantities. Rubies and sapphires are essentially made from aluminium oxide. The red colour of ruby comes from traces of chromium. Sapphires colour comes from other elements, for example titanium or iron. Both rubies and sapphires also contain some magnesium ...