\u00a9 2021 wikiHow, Inc. All rights reserved. At the minimum, you should add a rust preventative. Licensed under CC By 2.0. Trim saws will last and work well without any lubrication other than water. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Franz Löhner thinks, that only forged iron chisels can cut through the hard granite. Remember to use locking pliers to guide the agate through the blade whenever the pieces become too small to safely hold between your hands. This will cause the stone to chip rather than break. You can also cut an agate into multiple slices of at least 0.5 cm (0.20 in) or thicker if you want. Expanding existing fractures would reduce the useable areas and value of the material too much to be worth the savings in labor. You’ll use nippers almost exclusively for removing small amounts of material from either facet rough or edges of cabbing material that’s already been slabbed. You can get a pack of multiple disposable dust masks starting at under $10 USD as well. This image may not be used by other entities without the express written consent of wikiHow, Inc.