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| Metal Alloys: Sterling Silver is an alloy of 92.5% silver and 7.5% other metal (usually copper.) Also known as .925 Sterling. The other metal is added to make the silver stronger. Nickel, also called nickel silver or German silver, contains no silver. It is an alloy of 65% copper, 17% zinc and 18% nickel. The Nickel we use contains no cadmium which many people are allergic to and can cause health problems. Red Brass, also known as Jeweler's Bronze or Merlin's Gold, is an alloy of 85% copper and 15% zinc. Yellow Brass is an alloy of 70% copper and 30% zinc. The lower amount of copper and higher amount of zinc makes this a yellow brass. |
Mohs' Hardness Scale Shows the hardness of minerals in a range of 1 to 10 where talc at 1 is the softest and diamond at 10 is the hardest. On this scale minerals with higher Mohs numbers can scratch minerals with lower Mohs numbers. The steps along the scale are not regular, for example #2 and #3 are close in hardness where as #10 is 80 times harder than #9. Hardness refers to a minerals resistance to scratching. Although diamonds can only be scratched by another diamond they can be cleaved (chipped/broken) by a sharp blow.
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Unicorn's Garden
Kalamazoo
Michigan, USA
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