Has anyone figured out a way to polish calcite? I know its soft but there must be a way. I gathered up some nice pink ornamental stone used to put around shrubs, etc. I put it through the Vibe with AO with no shine results. I run the polish cycle again with TO and still no results. I cushioned pretty well with ceramic and soap but it just didn't take a shine. Has any one been able to shine the stuff?
God of Multiple Parallel Universes Full of Rocks and Apprentice to THE ONE.
Calcite and the tumbler are not friends! Basically you end up with a calcite slurry! And polishing works pretty good with calcite. I tried cabbing some but pretty much failed as the calcite was just too soft for my heavy handed ways.
I can't tell if thats some Gneiss Schist, or that Schist is Gneiss. All I know is don't take it for Granite
Post by Hard Rock Cafe on Mar 7, 2011 11:48:20 GMT -5
Here's why it doesn't work in a tumbler, from wikipedia: "Calcite can be either dissolved by groundwater or precipitated by groundwater, depending on several factors including the water temperature, pH, and dissolved ion concentrations. Although calcite is fairly insoluble in cold water, acidity can cause dissolution of calcite and release of carbon dioxide gas. Calcite exhibits an unusual characteristic called retrograde solubility in which it becomes less soluble in water as the temperature increases. When conditions are right for precipitation, calcite forms mineral coatings that cement the existing rock grains together or it can fill fractures."
Some rocks aspire to greatness; others are destined to be grit carriers.
Post by deb193redux on Mar 9, 2011 14:33:08 GMT -5
tweaking the pH to prevent it dissolving is a very neat idea. I have a dim memory of something similar for cleaning iron off of calcite crystals without dissolving them. But I think soft still presents a problem.
Shotgunner: It's almost spherical! gimme a G - an A - a B- another B- an R - give me an O - What;s that spell?? Gabbro!!
Nov 24, 2013 21:28:52 GMT -5
Shotgunner: cutting AND spheremaking - life is grand.
Nov 24, 2013 22:16:28 GMT -5
wampidy: Is that a rock or a brother that talks a lot? I prefer good old American names like "wampidy"
Nov 25, 2013 7:18:43 GMT -5
rockpickerforever: I am taking care of business - at Ford dealership, getting oil changed in FX4 before heading out to desert tomorrow. I love wi-fi! Will be going thru RTH forum DTs while away, no wi-fi out there. Maybe McDs in Yuma?
Nov 26, 2013 13:19:36 GMT -5
Fossilman: Good luck Jean.....
Nov 26, 2013 15:19:31 GMT -5
rockpickerforever: Thanks, Mike. You can bet I'll have fun, one way or the other!
Nov 26, 2013 15:26:48 GMT -5
herchenx: Has anyone heard from Jo lately? (NatureNut)
Nov 26, 2013 16:54:48 GMT -5
rockpickerforever: Jo was last online Nov 22 (four days ago), last post Oct 25.
Nov 26, 2013 17:15:24 GMT -5
drocknut: Have fun in the desert Jean.
Nov 30, 2013 20:49:04 GMT -5
Shotgunner: rock'n the homegrown pizzas tonight! woot!
Dec 1, 2013 19:06:41 GMT -5
Fossilman: Nothing better than making homemade pizza,plus the dough and sauce....
Dec 1, 2013 22:07:06 GMT -5
rockpickerforever: Thanks, Diane. Got home last night.Found just a few specks of gold, but had a great time. The weather was fantastic, enjoyed company of great friends, and way too much food! Typical TG, lol.
Dec 2, 2013 8:18:53 GMT -5
iamnoone: Just started my first tumble, my rocks are not going in circles like the thumler uv 18 videos I've seen online. They are just vibrating next to each other quickly. I followed instructions to the letter. Enough grit, water and rock. Am I just worrying?
Dec 2, 2013 18:55:28 GMT -5
herchenx: iamnoone - are the rocks already rounded or are they all jagged? is the barrel full up to within 3/4" of the top of the cone? Are you running a UV10 or a UV18 or something else?
Dec 3, 2013 15:31:58 GMT -5
catmandewe: Usually if they are just sitting there you have too much water. I usually add one drop of liquid hand soap also to make the grit stick to the rocks, but be careful not to add too much soap or water.
Dec 3, 2013 22:28:54 GMT -5