Post by johnjsgems on Apr 24, 2010 21:59:42 GMT -5
I've tumbled a lot of beach rock. They always come out better after at least a short run in 60/90 (several days to a week). Even though they are nicely rounded there are usually some deep scratches. I used to have access to a private beach in Central CA. that was literally all rock. You could fill buckets with good unfractured, unblemished rocks. They still came out better with a 60/90 run.
If you need some quickly (2-3 weeks) polished rocks of average quality for some project you can get away with starting at 120/220 with carefully selected cleaned beach rocks. But as John says it is best to do a 60/90 run first. Steve
God of Multiple Parallel Universes Full of Rocks and Apprentice to THE ONE.
Post by deb193redux on Apr 25, 2010 13:49:56 GMT -5
You should also test hardness and/or smash one to see if there are pits and fractures all the way to the center. Some beach rock is quartzite, and will take a hard polish. Other rock is very altered jasper, and is too soft to take a polish. Too many folks mistakenly believe any rock can be polished.
The fact that these are very rounded suggests that they may be the softer variety. Post a pic and maybe we can give an opinion on whether the rock will polish.
If they are not going to polish, you need to think about clear coatings.
mr.mohs: the moon & blood stone is in the grind mode...
Apr 18, 2014 11:52:48 GMT -5
mr.mohs: grindus interruptus!...jus got called into work...no rest for old rock grinders...
Apr 18, 2014 14:15:11 GMT -5
rockpickerforever: Dang, I hate it when that happens!! (Why'd ya answer the phone? LOL)
Apr 18, 2014 15:15:51 GMT -5
mr.mohs: usually I don't Jean --I'm impossible to get hold of...its a reduced schedule- jus a bunch old men-- trying hard--got lots done on the heart -- have more grind time--so I might well make a dime... mostly
Apr 18, 2014 15:45:24 GMT -5
rockpickerforever: Except for this time! Isn't that how it always goes? Yeah, I hear you, Ed, chasing the dime. But gee, I hope you made more than one... Or maybe just peanuts - mohstly... (it needed an "h"!) Ya got, what, one more week for your Heart hearts?
Apr 18, 2014 18:02:45 GMT -5
mr.mohs: always Jean I have Murphy law posted in my work area-- but I'm in good shape on the hearts...mostly
Apr 18, 2014 19:17:08 GMT -5
mr.mohs: its a good day when I make more than one
Apr 18, 2014 19:19:28 GMT -5
drocknut: Guess what?? Naw you'll never guess. I now am the owner of a new travel trailer and I'm off on my journey to maybe being a full-timer living in the trailer. I've never towed a trailer before so please warn all the pedestrians in Montana I'm on the road.
Apr 18, 2014 20:18:42 GMT -5
drocknut: I just happened to have to wait out a big wind at a KOA so got internet at least for tonight. Miss chatting with you all.
Apr 18, 2014 20:19:50 GMT -5
mr.mohs: sounds great Diane!! trailers for sale or rent....
Apr 18, 2014 20:24:54 GMT -5
mr.mohs: o you may not know that -- I just broke into roger miller tune --cause I'm king of the road
Apr 18, 2014 20:27:57 GMT -5