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2. History of money - Wikipedia

   en.wikipedia.org/wiki/History_of_money

   The history of money is the development over time of systems for the exchange, storage, and measurement of wealth. Money is a means of fulfilling these functions indirectly and in general rather than directly, as with barter . Money may take a physical form as in coins and notes, or may exist as a written or electronic account.

3. Gold - Wikipedia

   en.wikipedia.org/wiki/Gold

   Gold is a chemical element with the symbol Au (from the Latin word aurum) and the atomic number 79. In its pure form, it is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal, a group 11 element, and one of the noble metals.

4. Doré bar - Wikipedia

   en.wikipedia.org/wiki/Doré_bar

   Doré bar. A doré bar is a semi-pure alloy of gold and silver. It is usually created at the site of a mine and then transported to a refinery for further purification . The proportions of silver and gold can vary widely. Doré bars weigh as much as 25 kg.

5. Gold vs. silver: Which is the better investment?

   www.aol.com/finance/gold-vs-silver-better...

   Gold and silver are popular investments for those looking for a store of value and an inflation hedge.

6. Precious metal - Wikipedia

   en.wikipedia.org/wiki/Precious_metal

   The best known precious metals are the coinage metals, which are gold and silver. Although both have industrial uses, they are better known for their uses in art, jewelry, and coinage. Other precious metals include the platinum group metals: ruthenium, rhodium, palladium, osmium, iridium, and platinum, of which platinum is the most widely ...

7. Electrum - Wikipedia

   en.wikipedia.org/wiki/Electrum

   Electrum. Electrum is a naturally occurring alloy of gold and silver, [1] [2] with trace amounts of copper and other metals. Its color ranges from pale to bright yellow, depending on the proportions of gold and silver. It has been produced artificially and is also known as "green gold".