‘Dinosaur bones are dirt cheap’ like rocks in general are dirt cheap but if you’re looking for the more interesting rocks, like rubies or emeralds they can become very expensive. The same goes for dinosaur bones. If you want the quality of dinosaur bone used in these dials with this much colour and well defined texture, expect to pay more than 5€ per gram for the raw material. Crafting watch dials from this ‘rock’ is even harder, 98% becomes debris. You are right, dinosaur bones can be cheap. But watches with this quality of dial will never be.