Earrings Hook Closure: 925 Sterling Silver Stud Earrings,Easy To Wear,Finish: Rhodium Overlay,Eco-Friend Brass With 14k White Gold Plated,18k Rose Gold,24k Yellow Gold, All Are Nickel Free,Hypoallergenic.Meet Your Needs For Different Colors. Stone: Opal Is Synthetic Lab Created White Opal ,Opal Is October'S Birthstone Gemstone,Is The Lucky Stone Of Aquarius In The 12 Constellations, The Mystic Fire Topaz And Sapphire Are Also Synthetic Lab Created,Stone Is The Cutting Surface Of Gem, Which Is Very Close To The Color And Effect Of Real Gem,You Will Like Them. Weight:Total Set about 5.78g,Earrings:2.38g Per Pairs,Pendant and Box Chain is about 3.42g,Earrings Szie:18mm*9mm(0.7*0.35inch),Pendant is 26mm*10mm(1*0.4inch),The Chain is Box Chain,The Length is 45+5cm(18-20inch),5cm/2 inch extend chain,can adjust the size by yourself.