Horror master Cronenberg makes art from 'beautiful' kidney stones

Presumably those stones have built up over a lifetime.

Why analyse them at 79?

Just give it up to evaluate humans’ sick brains. Pearls from sea shells for example are seen very precious , beautiful and very valuable, because naturally developed ‘stones’ , but in this quite similar case of developed stones in a natural body, the opinions are exactly on the opposite, declaring it ‘shocking’, strange, ‘horror’ and the like. It’s therefore of no use to discuss both extremes.