smittenbrit's Blue wedding

I want to use these when making my Wedding dress and bridesmaid dresses, but I have read on some sites not to use the bejeweller, or the iron on method on silk or delecate fabrics. Then on another site it wil read perfect for delecate fabric crafts. I will be using it on silks, very delecate and laces and chiffons. in particualr lightweight dress silks and silk dupion. Has anyone used this hot wand before or these gems on delecate silks? How did you find it? does it really ruin the delecate silks using the hot wand, or does it not get that hot?

I really want to use these for the details on my dresses as I want to do intricate work. But I would love some feed Back on how well it works with silk before I spend my money?