Note: happened quite some time ago and may not be relevant today.
We sort of got scammed in Thailand, we went to a “kings birthday jewellery store” as I needed a ring as we got married there. Picked up a beautiful Chinese dragon ring. When we got back to Australia I asked a jeweller to resize the ring for me and suggest a replacement for the pink stone eyes. Turned out the eyes were rubies, it was gold and the diamonds & sapphire looking stones were real as well.