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.
jakesrocks: Hey Bob, haven't checked my shed yet. Don't know how much howelite he left behind. & a couple buckets of T-Eggs that I forgot I had. I'll check in the morning when it's cool. (101 heat index right now. Hotter in the shed.) Maybe I can fix ya up.
Jul 23, 2015 18:15:42 GMT -5
jenb: Does anyone have some good tips on identifying "slag"? I have some that I get on the beach in Michigan called Leland Blue. Sometimes it's hard to tell if it's slag or just a beach stone.....I know the pitts can help identify. Wondered if anyone has some ot
Jul 24, 2015 9:00:15 GMT -5
jenb: other good tips. Thanks
Jul 24, 2015 9:00:24 GMT -5
Fossilman: jenb,post photos in the ID section of the forum-you will get help there! Thumbs up...This is the BS section..
Jul 24, 2015 10:28:02 GMT -5
Fossilman: Don,what kind of Thundereggs do you have? I'm interested!! Thumbs up
Jul 24, 2015 10:28:50 GMT -5
jakesrocks: Hey Mike, I'm not sure. I inherited them from my old childhood rock mentor. Gonna haul them out, hose the bugs off & split a few to see what's there.
Jul 24, 2015 11:00:13 GMT -5
jenb: Hey, tried to post some pics, but it says the forum is full. It won't download my attachments.......any ideas??
Jul 24, 2015 16:50:26 GMT -5
jenb: I'm not the most computer savvy....maybe I'm doing something wrong..????
Jul 24, 2015 16:51:57 GMT -5
jakesrocks: You'll need a photo hosting site like Photobucket to post on here.
Jul 24, 2015 16:55:49 GMT -5
jenb: Who can explain how to post photos like they are speaking to a 4 yr old.........or 90 year old????????????
Jul 24, 2015 17:15:50 GMT -5
jenb: I get it....didnt mean the ?
Jul 24, 2015 19:57:48 GMT -5
mr.mohs: when in doubt-- shout it out! mostly™
Jul 24, 2015 20:11:47 GMT -5
drocknut: Rainy day here, we need the rain but it sure puts a damper on my mood and work.
Jul 27, 2015 10:55:12 GMT -5
jakesrocks: No rain here yet. Just very high dew point. 85 & feels like 95. Rain coming again tonight.
Jul 27, 2015 13:07:17 GMT -5
Fossilman: Cool today,showers lastnite-We get 7 or 8 days of triple digits coming again,starting tomorrow!!!....Huge frown!!!
Jul 27, 2015 15:00:52 GMT -5
jakesrocks: Better come back to the Dakotas Mike. Low to mid 80's for the next week. 50% chance of a sound & light show tonight.
Jul 27, 2015 21:03:12 GMT -5
jakesrocks: WooHoo, gully washer last night. Came in around 1:00 AM. 60 + MPH winds. Got all of the siding on the house washed. Don't need to haul out the pressure washer to do it.
Jul 28, 2015 11:03:40 GMT -5
drocknut: Sun came out and it's warming up but the wind is horrible.
Jul 28, 2015 12:26:38 GMT -5