Signed Vintage Mystic Topaz and Fire Opal "As Is" 925 Sterling Silver Ring

This is a hallmarked 925 sterling silver ring with mystic topaz centre stone and fire opal. The maker's mark is TGI. Despite looking remarkably like an authentic stone topaz, I have come to the conclusion that it is in fact synthetic. The diamonds tested negative, so are for sure faux, and I'm pretty sure the opal is synthetic as well. The metal is sterling silver without a doubt. There are two opal stones missing, and I have lowered the price to reflect this. Ring weighs 6 g and is a size 7.25