Protective coatings can be made from 7 known types of hard carbons. Each type has some of the properties of diamond. The different types are made by loading the materials with hydrogen and graphite fillers. The more loading, the less content of the diamond part called (sp3). Engineering standards agencies plot maps for all types of these coatings using hydrogen (H) content (bad) and (sp3) content (good) as  the equivalent GPS locations for quality.		Texas diamond is made and sold under license by Texas diamond, inc. It is the closest on the "map" to natural diamond. It is the best there is. SampleB is made in Europe and shown for comparison.