Ornamentation (DMG)

While ornamentation has no effect on the function of an item, it does increase the cost. Ornamented items can also enhance the status of the owner as a man of wealth and influence. Of course, it also marks the character as a target for thieves and robbers.
Among the more popular types of ornamentation are jeweled mountings, engraving, embossing, inlaying, painting, plating, chiseling, chasing, etching, enameling, lacquering, carving, and gilding. Common items also can be made from rare and fantastic materials—perhaps as simple as silk or the wonderfully rare and incredibly supple hides of baby dragons. The cost of such items depends on the difficulty and skill of the work. It is best for you to decide a price (highly inflated over the original), although 10 times the normal cost can be used as a starting figure.