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2.5mm diameter stone-grade tungsten carbide rounded chisel for fossil preparation, to fit the ZPT-AT Ammonite. The rounded chisel is the classic matrix-removal chisel, suited to the vast majority of rocks. It is also brilliant for smoothing rock to provide an elegant frame for your fossil.

What is tungsten carbide? Stone-grade tungsten carbide is by far the best material for fossil preparation – it withstands the abrasive nature of rock and stays sharp far longer than other metals like steel which will quickly blunt and wear down to nothing. However, tungsten carbide can be brittle. A stylus can last many years without requiring replacement when looked after correctly.

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