Quindrel
Quindrel
GemForge

GemForge™rock tumbler

$149.99

  • Rubber barrel with 1 lb capacity
  • Four-stage polishing grit set
  • One-button timer with built-in shut-off
  • Kit includes 9 rough stone varieties

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  • Load the rough stones and the first-stage grit into the barrel, seal it and set it on the tumbler.
  • Press the button to start the timer. Repeat with each grit stage in order.
  • Open the barrel, rinse the stones and mount them in the jewelry settings with the gem glue.
  • GemForge Rock Tumbler with 1 lb Barrel
  • 9 Varieties of Rough Gemstone Assortment
  • 4-Stage Polishing Grit Set
  • Jewelry Settings & Findings
  • Adhesive / Gem Glue
  • Step-by-Step Instruction Guide

We offer free shipping on orders over $150. Once your order is dispatched, the estimated delivery time is 5 to 12 business days depending on your location — tracking is emailed as soon as it ships.

Changed your mind? You can return your product within 90 days of delivery for a refund — see our Returns page for the full policy.

What is in the GemForge tumbling kit

Rubber Barrel

The tumbler uses a rubber barrel with a 1 lb capacity. You load the rough stones and grit, seal the barrel and place it on the tumbler for the cycle.

Four-Stage Grit Set

The kit comes with grit for four polishing stages. You move through the stages in order, starting with the coarse stage and finishing with the polish stage.

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Timer Control

A single button starts the automated cycle. The timer has a built-in shut-off, so the tumbler stops at the end of the set cycle without you switching it off.

Jewelry Findings

Jewelry settings and findings are in the box, along with gem glue. After polishing, you can mount stones in settings for necklaces, bracelets or display pieces.

Frequently Asked Questions

The four grits are used in sequence, from coarse to fine. Each stage prepares the surface for the next. Rinse the barrel and the stones between stages so coarse grit does not carry over.

Yes, you can load stones you gathered along with or instead of the included ones. Group stones of similar hardness in one batch, and keep the barrel within its 1 lb capacity.

The barrel is rubber and holds 1 lb. Seal it fully before each run, and clean it between grit stages according to the step-by-step instruction guide.

The housing is ABS plastic, with the motor inside. Keep it on a flat, stable surface while it runs and wipe it down with a dry cloth when you are done.

The kit has jewelry settings, findings and gem glue. After you polish and rinse the stones, follow the instruction guide to glue them into the settings and let the glue set.

The kit has an assortment of 9 varieties of rough gemstones. They go into the barrel with the first-stage grit. The instruction guide explains how to load each batch.

Yes. The tumbler takes standard lapidary grits sold at hobby stores. Use the same stage order as the included set and keep each grit stage separate from the others.

Load stones and grit, seal the barrel, set it on the tumbler and press the timer button. The built-in shut-off stops the cycle. Repeat with the next grit stage.

Yes. A rock tumbler such as GemForge can load rough stones gathered outdoors as well as the nine included varieties. Rocks of similar hardness are usually grouped in one batch, and the barrel is 1 lb in size.

The rock tumbler kit includes a 1 lb rubber barrel tumbler, nine varieties of rough gemstones, a four-stage polishing grit set, jewelry settings and findings, adhesive gem glue and a step-by-step instruction guide.
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GemForge: A Rock Tumbler Kit for Polishing Gemstones at Home

The GemForge is a rock tumbler for hobbyists who polish rough stones on a workbench, craft table or classroom shelf. A 1 lb rubber barrel holds the stones, and a one-button timer starts the automated cycle with a built-in shut-off.

As a rock polisher, it follows a four-stage grit set that moves from coarse grinding to final polish. The rock tumbler kit also includes nine varieties of rough gemstones, so a first batch can start right away. Stones gathered outdoors can be loaded as well.

Sold as a rock polishing kit, it doubles as a small jewelry-making set. Each polished stone from the rock tumbler can be mounted with the included jewelry findings and adhesive gem glue. The housing is made of ABS plastic.

  • 1 lb rubber barrel
  • Nine rough gemstone varieties
  • Four-stage polishing grit set
  • Step-by-step instruction guide

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