The foundation that diamond values are based on are the Carat, Colour, Clarity and Cut of a diamond. These are the Four C's of diamond grading and have been the international qualifiers used to define the value of diamonds for centuries. The contemporary diamond industry the world over has tried to introduce a fifth C in an attempt to brand diamonds as "certified" or "conflict free." The branding provides added value to the diamonds but the jury is still out on what the Fifth C really is and the court of public opinion will decide this. The value of diamonds is also being re-defined by...