This is an absolutely beautiful Art Deco era 14k yellow gold ring. From the early 1900s It is an amethyst stone with seed pearls around it and blue enamel around top and down sides. Some of the enameling has worn away due to age, which you could possibly have redone.
I estimate the stone is 13mm in diameter estim. The marking inside ring has worn away, but you still could see 585(Europe markings), it means 14k. It was tested as 14k gold too. The size is 4 1/4(sizable).
The item "Antique Art Deco Amethyst Seed Pearl Enamel 14k Yellow Gold Ring, 1920s" is in sale since Wednesday, October 22, 2014. This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Fine\Art Nouveau/Art Deco 1895-1935\Rings".
The seller is "kingcollection1" and is located in Los Angeles, California. This item can be shipped to United States, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Luxembourg, Viet nam, Uruguay, Bangladesh, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Liechtenstein, Monaco, Macao, Martinique, Nicaragua, Peru, Pakistan, Paraguay, Canada, Sri lanka, South africa, Colombia, Barbados, Bermuda, Cayman islands, Maldives, Oman, Reunion, Philippines.