Misnomers of gemstones

Some sellers add qualifying words or prefixs to gemstones names that misrepresent their true identy to make them seem more valuable.These names called misnomers,for examples:dyed blue jasper called german lapis or swiss lapis,green glass called emerald,green sapphire called oriental emerald,topaz called mogok diamond,brazilian ruby or brazilian sapphire.So beware of those names.