I have two beautiful French crystal decanters by I.G.Durand 24%p.b.o Dose any one know how much they are worth and who is I.G.Durand is?

I don't know how much they are worth. But, I do know that if you click on the following image search, that you might find items that could be similar to the ones that you have. crystal decanters value - Google Image Search And, there's also the following searches to try. crystal decanters value - Google Search crystal decanters value ebay - Google Search

It seems hard to find your specific items and information about the maker on the web. It may still be out there, though. I would also check with a library that has books on the subject of glass and china collectibles, maybe even a bookstore that sells used and out-of-print books on various subjects.