Here is a good resource for aesthetics and wear resistance (due to surface hardness after plating).
http://www.ionbond.com/mm/LQ_Ionbond_Brochure_DecoSport_EN.pdf
You can then look at the colors available and see alot of similarities to household items that have these basic coatings.
When you see Kershaw using a Tungsten DLC, that is a very high end coating, and the ones in the pdf above are the lower end coatings.
