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Old 09-06-2021, 02:04 PM
k2gleaner k2gleaner is offline
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Join Date: Jan 2019
Location: NC
Posts: 519

Originally Posted by Rock Jock View post
If you are using quartz pebbles (aquarium gravel?) as your tumbling medium, I suggest using something else that is softer. The hardness of the quartz can't be good for the sharp surfaces required for metal cutting/tapping...
Thank you very much for the info. I was/am actually a little nervous b/c of the gravel that got stuck in every single die. There are a few pieces I haven't got out b/c I'm scared to damage the threads.

I'm not a rock tumbler but bought it to tumble coins - I metal detect a little bit.

My kids would like me to tumble some rocks so I might become one yet... it's partly the reason I bought it.

k2gleaner | Since 2/2019 | AT Pro
Prized find: (2) 2-reale pieces from an 8-reale Spanish coin, minted ~1731 in Seville, Spain.

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