Possible Clues:

• Extinct wild ox
• Ancestor of domestic cattle
• Recently extinct long-horned ox
• They were bovine of the bolder-sounding sort
• No more such a beast or such stones, by the sound of it
• Sounds as if there's no longer any metal in the stones
• A chorus rendered in The Bull
• Ancient cattle commemorated in gold and jewels, say
• Old beast had gold and diamonds, it's announced
• One no longer with us has wasted our cash