The common symptoms of sleep apnea to be aware of are: - Loud or frequent snoring. - Choking in sleep, gasping. - Pauses in breathing during sleep. - Anxiety. - Morning headaches. - Excessive daytime sleepiness. - Waking up with a dry mouth or sore throat.
For instance, while a one carat (1.0 ct.) good quality emerald may sell for somewhere between $525 and $1,125, a five carat (5.0 ct.) emerald of similar quality could sell for between $7,500 and $15,000 (prices are for comparison only, exact prices vary according to market demand).
World's Most Expensive Gemstone Per Carat Sold at Auction. Identified as one of the unique gems in the world, a flawless blue diamond was honored in 2007 as the most expensive gemstone in the world. The 6.04-carat diamond was sold for $7.98 million at Sotheby's auction in Hong Kong. The flawless blue diamond fetched $1.32 million per carat.