How to Choose a Rock for Tumbling: A Comprehensive Guide
Finding the appropriate rocks for your project might be challenging for anybody who has ever attempted tumbling rocks. Use this manual as a reference to find the best stones from the many options at your nearby stone yard or rock store. Features to look for while selecting rocks for tumbling will be discussed.
The vast majority of naturally occurring rocks are not suitable for rock tumbling. They have either too smooth an exterior (like shale or mudstone), will deteriorate in a rock tumbler, or have dangerously sharp edges and points. No need to stress if you can not track down rocks that meet these exact parameters. Tumbling is an effective method for smoothing and polishing nearly every kind of stone. Keep in mind that some rocks go better with particular types of stones and that different stones will require different levels of polishing.
Very little progress is generally made while attempting to polish soft rocks. When hunting for nice tumble stones, you should always attempt to select rocks that are at least slightly hard, such as granite or quartzite. The Mohs scale ranks minerals according to how readily they scratch other materials and one another. Tumbling works well with minerals that have a Mohs hardness of around six to eight; softer minerals like talc or gypsum can be difficult to polish. The sharp edges and points on rocks that have been exposed to the elements for too long should be avoided.
The polishing process is ruined when grit particles are trapped in the pores of the rocks. Tumbling rocks that have large holes or are not dense enough are not suggested since it yields poor results and wastes time and money on stones that cannot be used. To get the best results from a rock tumbler, use rocks that are thick and have few pores.
When it comes to polishing, brittle rocks are not the best option since grit tends to get caught in the cracks and your stones end up being shattered into a million small pieces. You should avoid using your rock tumbler on rocks that are already cracked or have seams that are filled with debris since these types of rocks will not polish up very well. It is fine to use pebbles that have slight fractures or fissures because these imperfections may be filled in with epoxy glue and some time spent in the tumbler.
If rocks fragment into smaller pieces when they are rubbed together, then polishing them with a rock tumbler is not going to be particularly effective. When rubbed against one another, the pebbles that you choose to utilize should not generate a substantial quantity of dust or grains, and their surfaces should be as smooth as possible. When used for polishing, stones with more pointed edges produce results that are significantly superior. If the rocks you have do not have any ridges or points that are exceptionally sharp, then it will be challenging for you to form stones out of them.