Ruben Bouwmeester
Chumono
I looked at jan his rock over and over. I still can't figure out what kind off material he is using. He won't tell in any case ( thats his good right) ,they are so unique!!! I think he is using different kinds of modern composiet and oxydes.Jan's are completely manmade. But he's super hush hush about what goes into making them. I assume it's something like what @Ruben Bouwmeester uses for his work. They look great up close in any case.