gold ingot

基本解释

Dumplings carry a special significance of wealth as they are in the shape of the gold ingot used as money in the Chinese ancient times;
水饺的形状像中国古时候用的元宝，具有「财富」的特殊意义；
This Blessings to World Expo Shanghai Commemorative Gold Ingot (200g) is made by authorization of the Bureau of Shanghai World Expo Coordination.
“世博祝福纪念金砖（200克）”经上海世博会事务协调局授权制造发行。
It is split that electricity amasses the golden silver mud on steel cotton to use chemical method. The gold mud is smelted become alloy. after smelting, silver mud can get the silver ingot of 98%.
电积到钢棉上的金银泥用化学方法进行分离，金泥经熔炼后得合质金，银泥熔炼后可得98%的银锭。

There's no marginal utility in warehoused gold although I guess you can make an ingot into a door stop.
FORBES: Magazine Article