This pendant was looked at the local jeweler shop in town, they confirmed that the Diamond is old mine and about 1800's. Pendant tested for high 10k which most likely is 12k.Thanks for looking at my items. The item "Antique Art Nouveau 10k Old Mine Diamond and Pearl Lavalier Necklace" is in sale since Thursday, May 9, 2019. This item is in the category "Jewelry & Watches\Fine Jewelry\Fine Necklaces & Pendants\Gemstone". The seller is "classic_jewelry" and is located in Sedalia, Missouri. This item can be shipped to United States, Canada, United Kingdom, China, Mexico, Germany, Japan, France, Australia, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Austria, Bahamas, Israel, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Bangladesh, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Liechtenstein, Luxembourg, Monaco, Macao, Martinique, Nicaragua, Pakistan, Paraguay, Uruguay, Philippines, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Turks and caicos islands, Russian federation, South africa, Colombia, Antigua and barbuda, Saint lucia, Barbados, Bermuda, Cayman islands, Sri lanka, Maldives, Oman, Reunion, Costa rica, Montserrat.