One of the great things about collecting contemporary art is that you mix with contemporary people.

I was always a little bit of a collector and a hoarder. And whenever I got involved in anything, whatever it was - even when I was a kid and I collected cigarette cards - I really got into it and had the most. So when it came to paintings, once I got the bug, I always wanted to buy something. But I really knew nothing about art.

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.

Unfortunately, some of the young talants are becoming fashionable. And anything that's fashionable can become unfashionable. So one has to watch that. And it's very easy today because there are so many events - art fairs, gallery openings, etcetera. In fact, that's another thing that concerns me, the quantity of gallery openings. In my office in London, I get back after a week, and I have 30 invitations. It's too much.

I went to a job and sat down as a proper apprentice, learning how to make jewelry. It involved a lot of remodeling and repairing. It was a bad time in England in those days and people didn't have much money - they would repair a ring rather than buy a new one. They would thicken up the gold. I learned all the ways to make something look new again.

One of the great things about collecting contemporary art is that you mix with contemporary people.