National Geographic Rock Tumbling Media – GemFoam Reusable Rock Polisher Foam, Use After Rock Tumbling Grit Cycles, Adds Shine to Tumbled Rocks and Minerals, Rock Tumbling Supplies

Decent quality and price. Good selection of grits

Working well so far!

Very good buy!

We bought these looking for another way to try to get our rocks to shine with a wet look. They make our rocks a little more smooth, but we still can’t figure out how to get the wet look on them. They are reusable, but you need to make sure you keep track of what you used them with or after because you don’t want to add grit to them. I would say they worked okay. The price was decent.

Let me spill the gems on a rock-solid addition to my lapidary adventures – the NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit. As a self-proclaimed rock enthusiast, this kit has truly rocked my world, giving my gemstones the shine they deserve.What's crystal clear about this refill kit is its top-notch quality. Packed with premium grit and polish, it's like giving your rocks a spa day. Whether I'm polishing up some quartz or tumbling some jasper, this kit ensures that my gemstones shine bright like a diamond.Using the NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit is a gem of an experience. Its easy-to-follow instructions make it a breeze to use, and the results speak for themselves – my stones come out looking so polished, they could rival any jewel in the crown jewels.Since I started using this refill kit, my rock tumbling game has gone from pebble to precious stone. Whether I'm crafting jewelry or just adding some sparkle to my collection, the NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit is my go-to for achieving that rockstar shine.In summary, if you're a rock enthusiast looking to add some sparkle to your collection, the NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit is a gem of a find. With its top-quality materials and stunning results, it's sure to rock your world.

First and foremost this review is for the foam pieces. I noticed the reviews are all mixed for different National Geographic rock tumbling productsI am very pleased with the foam to use after step 4 which as others have stated left the rocks or minerals still very dull not shiny, this got the job done. Just use it after step four if you were using National Geographic grit as instructions suggest. I am also getting a better step 4 from another brand to compare that with the foam to see if it does better or the same as foam but as for now I am very pleased. Here in this photo I tumbled a chert in the foam after Nat geo 4 step. Chert is the stuff you commonly see in Some concrete It has a hardness of seven I'm thinking that at least for the foam anyway the harder the rock the better they shine like this one does quite well. I am currently tumbling a less hard rock serpentinite with hardness of four or five and it’s not getting quite as shiny but I think it’s still better than before, I am letting it tumble longer. So Basically if it’s a six or seven or harder it will shine better using these whereas step four did nothing using National Geographic. It’s cool that these rocks in the photo came from my backyard doesn’t look like something from a backyard once you shine them up like this pretty coolUpdate: The pictured rocks turned out amazing, however the serpentinite never got shiny. My conclusion is that these foam pieces only work for harder rocks that are somewhat smooth to begin with. The rocks in this photo were somewhat smooth to begin with but not shiny the foam without a doubt made a huge difference the light did not bounce off them like it does now also they are now silky smooth as opposed to somewhat smooth. So if you use these bear in mind they will only work for harder somewhat smoother rocks. I did use a better step 4 for my serpentine and I still see no difference so just like with the foam I think some rocks are just not going to shine as well as others. The foam still gets a five star for what it did to that chert though and you do need to go the full 3 days of tumbling because after day one I saw no results. A total of five days in the foam wouldn't hurt either I was pleased with 3 though.

good price thanks

Good product for final polish, good cheap price and quick delivery