Possible Clues:

• Grayish-white metal
• Valuable substance symbolically displayed in centre of receptacle
• Metal used in jewellery
• Precious metal is enviable setting for a cheap one
• Can get into the fruit for Pt, in short
• Metal from a can that's got into fruit
• Like some credit cards
• Metal coating no good - lump with sides peeling off
• Metal, a base metal: the best around
• No. 78, fruit in a can? On the contrary, outranking ...