Friday, July 3, 2020

Gold: 10 facts about the precious and rare metal you didn’t know

1. Gold is the only metal that is yellow or “golden.”

Other metals may develop a yellowish color, but only after they have oxidized or reacted with other chemicals.

2. Most of the gold on Earth is not from our planet.

Nearly all the gold on Earth came from meteorites that bombarded the planet over 200 million years after it formed.

3. Gold is extremely ductile.

A single ounce of gold (about 28 grams) can be stretched into a gold thread 5 miles (8 kilometers) long.

4. Gold is present almost everywhere.

Excluding Antarctica, gold has been discovered on every continent of the planet.

5. Gold is the most malleable element.

A single ounce of gold can be beaten into a 300-square-foot sheet. A sheet of gold can be made thin enough to be transparent. Very thin sheets of gold may appear greenish blue because gold strongly reflects red and yellow.

6. NASA uses gold in space technology.

The visors of astronauts’ space suits are coated with a layer of gold that’s just 0.000002 inches thick.

7. The purity of gold is measured in karats.

Pure elemental gold is 24 karats, while 18-karat gold is 75 percent pure gold, 14-karat gold is 58.5 percent pure gold, and 10-karat gold is 41.7 percent pure gold.

8. Gold has been used in dentistry for at least 4,000 years now.

Archaeologists have found gold dental modifications in skulls from Southeast Asia dating back 4000 years.

9. Olympic Gold medals are actually not gold.

Olympic Gold Medals only contain 1.34% gold.

10. Indians own a lot of gold.

Indian housewives hold 11% of the world’s gold. That is more than the reserves of the U.S., IMF, Switzerland, and Germany put together.

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