How did gold and silver lead to the railroad boom?

The boom in gold in silver brought miners to wherever said minerals were discovered. When the miners needed supplies merchants came too. They whould build whole towns called mining towns. Mining...

The most famous play to feature a contest with caskets made of gold, silver, and lead is William Shakespeare's The Merchant of Venice.

Pewter. Gold, Silver, and lead are all pure elements, where as pewter is an alloy. What this has to do with PKmon, I don't know~

White gold is gold with different alloys than yellow gold. Gold comes in all sorts of varieties (green gold, antique gold, yg, wg, etc). You can tell because it is measured in karats, whereas silver...

Gold has the highest density of the metals listed.