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https://www.mjewelry.com/precious-metals-guide
12 rows · Metal Hardness level (Mohs scale) Common Alloys Pros Cons; 24k yellow gold: 2.5 brilliant ...
https://www.firemountaingems.com/Resources/encyclobeadia/charts/BDRSGDTJWLRYMTL
The balance of the metal is alloy. 14Kt is the standard fineness used for most jewelry in the USA. Our 14Kt gold has a rich yellow color and has hardness and durability suitable for lasting use. Our 18Kt gold has a darker color with a deeper yellow tone. Nickel Silver - an alloy of copper, nickel and zinc.
https://www.jewelry-secrets.com/Blog/the-durability-and-hardness-of-metals/
Sep 12, 2010 · Metal Hardness is usually defined by the Rockwell Hardness Test. But when we are dealing with Jewelry, most people are more familiar with the Moh’s Scale. Top 5 Durable Metals. From the list, you can see that the Top 5 Durable Metals used for Jewelry are: Platinum 4 – 4.5; Titanium 6; Hardened Steel 7 – 8; Tungsten 7.5; Tungsten Carbide 8.5 – 9
https://www.jewelrynotes.com/the-mohs-scale-of-hardness-for-metals-why-it-is-important/
The Mohs Scale of Hardness for Metals. Here is a list of the hardness grades for some of the metals that you are most likely to come across in your everyday life, especially when dealing with jewelry: Lead: 1.5; Tin: 1.5; Zinc: 2.5; Gold: 2.5-3; Silver: 2.5-3; Aluminum: 2.5-3; Copper: 3; Brass: 3; Bronze: 3; Nickel: 4; Platinum: 4-4.5; Steel: 4-4.5; Iron: 4.5; Palladium: 4.75
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