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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". [3]
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Mohs hardness kit, containing one specimen of each mineral on the ten-point hardness scale. The Mohs scale (/ m oʊ z / MOHZ) of mineral hardness is a qualitative ordinal scale, from 1 to 10, characterizing scratch resistance of minerals through the ability of harder material to scratch softer material.
Gold vs. silver: Volatility. Silver tends to be more stable, in part because it tends to rise with economic growth while also being a safe haven asset in tougher times, says Agrawal. But in ...
Gold traded at $1,960 per ounce. While the details vary, the gap is consistent. Gold is historically much more expensive than silver. This is in part because silver deposits are nearly 20 times as ...
A noble metal is ordinarily regarded as a metallic element that is generally resistant to corrosion and is usually found in nature in its raw form. Gold, platinum, and the other platinum group metals (ruthenium, rhodium, palladium, osmium, iridium) are most often so classified. Silver, copper, and mercury are sometimes included as noble metals ...