An appropriate gift for the twentieth wedding anniversary is "China". This would make it popular in Britain or the USA to give porcelain bone China for a traditional gift. Another more modern gift would be platinum. Perhaps the most appropriate gift would be to give China that has gilded edges of platinum as offered by certain designers.
This is called a silver leather wedding anniversary and it is celebrated by men and women after completion of 20th wedding anniversary. There are many couples in this world that celebrate their wedding ceremony.