We went to Siem Reap in February 2006 and enjoyed our trip visiting Angkor Wat etc and also had a chance to go to some of the shops selling precious stones as well as gemstones & souvenir Shops. As usual our group (regular travellers) always like to get something popular in that particular country so the guide took us to some of the shops saying that blue sapphires & rubies are from their country. Each of us spent a few hundred USD on the stones and found out later when we got back home that they are all coloured stones! We felt cheated and called the Embassy in our country and was told that there is nothing much they can do! So, please beware, don't buy anything from them, just visit Angkor Wat!