Ivory

With the CITES restrictions on the material, it's now next to impossible to obtain elephant ivory - unless, of course, you can find the ever more rare old billiard balls. And I certainly don't intend to hack into the two old Thai bangles I possess; they're a rarity in their own right.

Many netsuke-shi now have resorted to using mammoth ivory, as did some of their predecessors. But that, too, will get increasingly rare. There is, after all, a limit to dead mammoth. It's also difficult to find pure white pieces that aren't too chalky. It won't stand water-based bleaches, stainings or cleansers because that can cause surface cracks that may deepen over time. It's also becoming more expensive at between £100-£200 per pound.

Other ivories? Hippo tooth, fossilised walrus tusks and some sharks' teeth are available, but these tend to be small pieces without the versatility of the bigger mammoth and elephant ivories. On the other hand, they can test the netsuke-shi's powers of adapting his/her skill to fit the material available.

Purists and collectors will probably hand-wring for eternity, but I see no reason why carvings can't also be made from the good ivory-like plastics now coming onto the market. They are, after all, just more blank canvases with qualities of their own. A good netsuke-shi would be able to exploit these.