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.
Identify 22-karat gold by the â22Kâ mark, which indicates that jewelry is 91.6 percent pure gold, or 22 parts pure gold out of 24. Note that 22-karat gold jewelry can also be stamped with â916â or â917.â. Remember that an â18Kâ mark means jewelry is 75 percent pure gold, or 18 parts pure gold out of 24.