Jet lag symptoms may include: 1  Disturbed sleep â such as insomnia, early waking or excessive sleepiness. 2  Daytime fatigue. 3  Difficulty concentrating or functioning at your usual level.  Stomach problems, constipation or 1  diarrhea. A general feeling of not being well.  Mood changes.
10-karat gold is an alloy made up of 10 parts gold and 14 parts other metals such as copper, zinc, silver or nickel. In percentage terms, 10K gold contains 41.7% pure gold.Jewelry that is 10K gold will usually be stamped with a mark such as 10KT, 10K, 10kt or something similar. If you see a mark reading .417, this also means that the item is 10 karats gold.n percentage terms, 10K gold contains 41.7% pure gold. Jewelry that is 10K gold will usually be stamped with a mark such as 10KT, 10K, 10kt or something similar. If you see a mark reading .417, this also means that the item is 10 karats gold.
We need to alloy it - that is, to mix it with other metals to make it harder and more rigid for use in jewelry. Pure gold is 24 karat and, in an alloy, the parts out of 24 that are gold are said to be it's karat. So 14 karat gold is 14 parts gold and ten parts other metals or 58.5% gold. To make karat alloys of yellow gold, the other metals are silver and copper, a mixture which retains the yellow color. To make white gold, nickel or palladium are primarily used instead of the copper and silver blend.