Iris Silver Mist by Serge Lutens (I house I generally despise) is one of the few modern fragrances I would dare to discuss on this blog. It takes its place beside the queen of irises, the regal and long lost Iris Gris. ISM is cold, powdery, spicy, rooty, peppery, and above all else, irisy. In no other extant fragrance is there such a high concentration of orris compounds.
The opening is pungent like slicing open a beat and inhaling deeply. There is pepper, root, earth, and a bit of doughy carrot. This phase quickly gives way to the cold, icy orris heart of the fragrance. The orris is of top quality in conjunction with the rare and expensive Robertet iris base.
To my knowledge, Silver Iris Mist is the only fragrance on the market that contains large quantities of natural orris butter and other natural orris compounds. Is it as good as Iris Gris? Probably not, but you could do much worse. In the heart, the icy orris root comes to the fore. The base contains a little sandalwood and a slightly soapy musk reminiscent of the long lost Gris (do not be fooled by MPG Iris Bleu Gris as it has nothing to do with Iris Gris).
I would suggest buying ISM while it is still available if you are interested in the best available iris fragrance. Is it cheap? Certainly not, but the quality of the iris compounds justifies the price and may, of course, only be available in the States for a short period of time—ISM was once a Paris exclusive.