"SECTION 150. Non-essential Goods. - There shall be levied, assessed and collected a tax equivalent to twenty percent (20%) based on the wholesale price or the value of importation used by the Bureau of Customs in determining tariff and customs duties, net of excise tax and value-added tax, of the following goods:

"(a) All goods commonly or commercially known as jewelry, whether real or imitation, pearls, precious and semi-precious stones and imitations thereof; goods made of, or ornamented, mounted or fitted with, precious metals or imitations thereof or ivory (not including surgical and dental instruments, silver-plated wares, frames or mountings for spectacles or eyeglasses, and dental gold or gold alloys and other precious metals used in filling, mounting or fitting of the teeth); opera glasses and lorgnettes. The term 'precious metals' shall include platinum, gold, silver and other metals of similar or greater value. The term 'imitations thereof ' shall include platings and alloys of such metals;

"(b) Perfumes and toilet waters;

"(c) Yachts and other vessels intended for pleasure or sports.