Let’s face it a piece of jewellery made from diamonds is likely to be one of the most prized possessions of your life, especially if it is an engagement ring or a beautiful heirloom, passed on from a close relative. The beauty of a diamond is more than skin deep since they are considered by most people to be the hardest substance on earth. This said though they are not indestructible for while they can be cut or polished only by another diamond, a hard crushing blow can cause them read more > >