We purchased a property to renovate and this book clearly set out the steps we needed to consider. It laid out all of the building regulations we needed to comply with, some of which we were not aware of. It gave us clear guidance on likely costings and additional items we needed to be be aware of. It's been a great help throughout the project and we would happily recommend it!
This. If you are dealing with diamonds on a day to day basis you need this as an essential reference guide. It provides information on all aspects of diamond grading, which ultimately governs how much you should pay rather than what you are asked to pay. Its not for the faint hearted and is quite technical in places, but it is aimed at professionals.