The Graff Hallucination is a sculptural masterpiece; a celebration of the miracle of coloured diamonds. For many years I have thought about creating a truly remarkable watch that illustrates our all-consuming passion for diamonds. The Hallucination has made my diamond dream a reality.

Art is like an avalanche being poured down your throat. You know it's going to crack, eventually it's going to go out of fashion. I wish there was much less happening. I wish there were fewer art dealers. I wish there were fewer auctions. I wish there were just two auctions a year.

I think a lot of people are involved in art because of the fashion of art and the conversation. It gives them a certain sophistication, something to speak about. But art is, if it's conceptual, really about understanding the concept. And if it's beautiful, it's about seeing the beauty. It's gone much further than that now. There's too much commercialism attached to art. If the market cracks one day big-time, you'll frighten so many people away who will never come back. Because they don't really feel for art. People who buy art should want it because they love it, they want to enjoy it.

I wish there were fewer art dealers. I wish there were fewer auctions. I wish there were just two auctions a year. It's just too much. And at the end of the day, if you're a dealer and a professional, fine, that's your business, that's all you do. But as an individual, if you're not a dealer and it's not your business, you need time for these things. You need time to study what's happening. You need time to understand the market. You need time to go to a museum. You need time to see a show. You can't go to one every day. It's becoming a trend.

I went to an auction in the late '70s and bought a small Renoir. People said, "Why did you buy a Renoir that size?" I said, "I can put it in the safe with my diamonds." And that was a true story. I bought it to put it in the safe.

It's the rough diamond that dictates what you can get out of a diamond. You can't say, "I'm going to make this," or, "I'm going to make that." It's nature. Whatever nature gives us, we explore and we build on. We can't create something that is not in the stone, so we take away as many imperfections as we can. Sometimes, you can't take them all away. But mostly, our cut, our polish, the life we put into the stones, the beauty that we bring out is exceptional.

You learn about yourself when you're collecting art. You learn what you're capable of. After all, we're not speaking about pennies-we're speaking about vast sums of money. I do it on my own back without advice, so I've got the confidence to do it.