As used in this chapter, the following terms shall have the meanings indicated:
One who purchases precious metals from the public and sells or otherwise exchanges or trades the precious metals to refiners or brokers or makes appraisals of the precious metals or otherwise conveys, melts down or alters said precious metals in any form.
Gold, silver, platinum and their alloys as defined in N.J.S.A. 51:5-1 et seq. and N.J.S.A. 51:6-1 et seq.
Not only the exchange of money for precious metals, but the exchange or trading of any other tangible or intangible property for precious metals.