ALL Different Types of Diamonds Exaplained! Naturally Colored Gemstones Colorado Geological Survey Colorado Geological Survey Natural Diamonds Origin Diamonds South Africa Diamond Types And Cuts VRAI Diamond Gemstone Stock Photos, Pictures & Royalty Free Images iStock 4 Cs of Diamonds: Understanding Cut, Color, Clarity, and Carat Weight. Meet the Diamond Brothers, the world's worst private detective agency, in this Chandler esque spoof from the creator of the bestselling Alex Rider series. Life as the younger brother of the world's most defective detective can be tough and these two adventures will test Nick to the full. What connects them? Murder! And if the Diamond Brothers don't play their cards right, they could be next