Decided to give tumbling a go for my first time, Ended up with all these little cracks. Is it from not cleaning my rock tumbler enough between grits? : r/RockTumbling

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KomeStone Hobby Rock Tumbler Kit, Patent Protected Durable Complete Rock Polisher for Beginner, 3-Speed Motor & 9-Day Timer, 6 Belts, Rough Gemstones, Polishing Grit, STEM Gift for Kid Adult : Toys