One of astley clarkes most iconic symbols the cosmos pendant features an infinity of diamonds set in 14 carat yellow gold this diamond necklace has an extendable chain to suit a variety of lengths and is finished with the astley clarke signature star set diamond tag astley clarke is a brand loved by all celebs and the cosmos necklace has been spotted on fearne cottoncollection the cosmosgemstone diamonddiamond specification 00726ct hi si2 s cmetal yellow goldmetal type 14 carat gol