Rare Gemstones at SnazLondon.com
Showing posts with label Precious Metals. Show all posts
Showing posts with label Precious Metals. Show all posts
Tuesday 2 April 2013
Check out some of our rare Gemstones
Check out some of our rare Gemstones - ready to be set into jewellery of your own design!!
Rare Gemstones at SnazLondon.com
Rare Gemstones at SnazLondon.com
Saturday 28 April 2012
Article - Precious Metals - Gold
About Gold
Gold is a chemical element with the symbol Au (from Latin: aurum "gold") and an atomic number of 79. Gold is a dense, soft, shiny, malleable and ductile metal. Pure gold has a bright yellow color and luster traditionally considered attractive, which it maintains without oxidizing in air or water. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive solid chemical elements. The metal therefore occurs often in free elemental (native) form, asnuggets or grains in rocks, in veins and in alluvial deposits. Less commonly, it occurs in minerals as gold compounds, usually with tellurium.
Gold resists attacks by individual acids, but it can be dissolved by the aqua regia (nitro-hydrochloric acid), so named because it ...
Gold is a chemical element with the symbol Au (from Latin: aurum "gold") and an atomic number of 79. Gold is a dense, soft, shiny, malleable and ductile metal. Pure gold has a bright yellow color and luster traditionally considered attractive, which it maintains without oxidizing in air or water. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive solid chemical elements. The metal therefore occurs often in free elemental (native) form, asnuggets or grains in rocks, in veins and in alluvial deposits. Less commonly, it occurs in minerals as gold compounds, usually with tellurium.
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| Gold Crystals |
Gold resists attacks by individual acids, but it can be dissolved by the aqua regia (nitro-hydrochloric acid), so named because it ...
Article - Precious Metals - Silver
About Silver
Silver is a beautiful pliable precious metal. Did you ever wonder what Sterling Silver means or the stamp 925 you may have seen on jewelry or seen quoted in a description of a silver piece.
Well basically, only Silver of a certain quality or more accurately, purity, can be referred to as Sterling Silver. Only metal which is at least 92.5% pure Silver can be called Sterling Silver. So you can probably guess what the numbers 925 means, and is synonymous with the term Sterling Silver.
So, Sterling Silver (925) is 92.5% pure silver, but what about the rest of the metal? Well, because Silver is a pretty soft metal, the remaining 7.5% of the metal alloy is made with other ...
Silver is a beautiful pliable precious metal. Did you ever wonder what Sterling Silver means or the stamp 925 you may have seen on jewelry or seen quoted in a description of a silver piece.
So, Sterling Silver (925) is 92.5% pure silver, but what about the rest of the metal? Well, because Silver is a pretty soft metal, the remaining 7.5% of the metal alloy is made with other ...
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