Hi gentlemans! First I must say thank you for your opinions, I waited critique, and meanwhile I´m reading compliments!
To the silver work - real sterling silver is only the ring on the second pipe (Flower). It´s my ring, cutted and reduced. The ring on the first pipe is made from stainless steel and third pipe has hard aluminium (dural) ring, that I made from old key(it´s oval). It´s right, this pipe seems too thin, but I had very small piece of briar and I wanted try this shape

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In my opinion, dural is a perfect material for pipe-rings, can it easy grinding and buffing to high gloss.