Rock Tumbling and Keepsakes
Polished stones from a rotary rock tumbler, sold by the scoop or turned into keepsakes from customers' own beach finds
Video published Sep 25, 2026 by Business Cortex
Startup cost: Low startup cost (hobby tumblers start under $100)
Source video
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What It Is
A rotary tumbler polishes rough stones over about four weeks while you just change the grit weekly. You sell polished stones individually, in sets or by the scoop to crystal shops, gift stores and jewelry makers. You can also polish stones and beach glass customers send you from holidays into keepsakes or pendants.
The Pitch
Business Cortex says hobby tumblers start under $100, that the machine runs on its own 24 hours a day, and that almost nobody offers the keepsake service of turning holiday stones into polished mementos.
Who It’s Best For
Patient hobbyists who like rocks and crafts and don't mind a slow cycle.
The Truth (as we see it)
No sales figures are shown. Each batch takes weeks, so income builds slowly, and tumblers are noisy. Polished stones are cheap per piece, so the keepsake service and jewelry add more value than bulk stones.
Our assessment, based on the video and what’s typical across similar videos. We don’t independently verify income claims or prices.
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