RockTalk: Gold in Colorado

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SKU: RT-06-02D Categories: , , , , Tags: , , , , , , , , , , ,
Citation: Colorado Geological Survey. “RockTalk V06N02, April 2003 - Gold in Colorado.” RockTalk, April 2003.

Description

This edition of RockTalk explores the history of gold in Colorado, how it is mined, and what it is used for. Digital PDF download. RT-06-02D

From the Introduction:

What is it about gold that makes it so attractive and so useful? Gold is not very hard; a knife can easily scratch pure gold. Gold is very heavy or dense, having a specific gravity of 19.3+ (extremely heavy even for metallic minerals). Some of the other characteristics of gold are ductility, malleability and sectility, meaning it can be stretched into a wire, pounded into other shapes, and cut into slices. Gold is the most ductile and malleable element on our planet. A single ounce of gold can be drawn into a wire 35 miles long and it can be hammered into sheets less than five millionths of an inch thick. Gold is a great metal for jewelry, as it never tarnishes.