Hi friends, I went to town today and found about 1.5 pounds of obsidian at Vinnie's Thrift Shop (75 cents). It's in three pieces, roughly 3" x 5" each, up to 1" thick. Some edges are thin and extremely sharp. I've never tried to polish this glass as I haven't had any rough material. Now with this, and maybe getting more, it may be time to try. It would have to be made into much smaller pieces, and I'm stumped as to how to cut it. Would my trusty little 7" tile cutter likely work. Using a saw seems counter-intuitive. I would expect the material to shatter. Can anyone set me straight on how to get it into smaller bits? Also, would it work to make up a load by adding pieces of ordinary glass? Thanks for your help. Cheers! Robbiejohn.
Post by ColtChainmailJewelryDesigns on Jul 20, 2011 3:18:29 GMT -5
Cutting it with a saw is a GOOD thing!!!! It's not likly to shatter unless it gets snagged or something. But I really should zip it before I say something that i dont even know about the truth, lol!
You can smash it with a hammer, but with so little amount you have, not a good idea. Smashing Obsidian make lots of tiny shards. But that isn't the way I do it anymore. And I find you can get lot less tiny shards (if any) if you hold the rock, and tap it on a sledg hammer on the ground! Seems like it brakes off larger bits. =)
You're better off tumbling obsidian with obsidian (of the same type). Using glass as a filler may work, but there are too many variables to know. Not all obsidian and not all glass are created the same.
As suggested in another post I tried a small diamond blade on my Dremel a few nights ago and found that it cuts it like butter and no chipping on edges. You get less waste than your tile saw would create. I know I`ll use mine for it again when needed. The blades are pretty inexpensive too for the Dremel.
Post by susand24224 on Jul 21, 2011 0:36:01 GMT -5
Overall I agree with Steve--many variables between glass and obsidian. That being said, I just tumbled some glass and obsidian and the variables worked out in my favor--both tumbled and polished nicely. I remember reading that glass can be as low as Mohs 5 in hardness and obsidian is 6-6.5 so it seems that if anything goes wrong it will be with the glass. This is just a *slightly* educated guess, though
drocknut: On the road again...I'll be back Arizona
Oct 7, 2015 8:39:44 GMT -5
mr.mohs: its a nice long road trip out of AZ...mostly... easy does it...
Oct 7, 2015 9:30:50 GMT -5
Rockhobbit: Where you headed Diane??
Oct 7, 2015 12:04:01 GMT -5
mr.mohs: not sure...last time I tried to guess her destination... I was horribly wrong ...mostly
Oct 7, 2015 20:01:34 GMT -5
drocknut: Won't keep you in suspense this time Ed ;-) Going to Montana for a quick trip.
Oct 8, 2015 7:54:07 GMT -5
mr.mohs: wow lots of on the road there, Diane --take it easy !
Oct 8, 2015 8:39:36 GMT -5
Rockhobbit: While most count down the days till Christmas, I count down the days till Quartzsite! LOL
Oct 8, 2015 11:55:23 GMT -5
jakesrocks: Ya Ya Ya. Diane can drive all the way to Montana, but can't come next door to South Dakota to say hi.
Oct 8, 2015 12:25:27 GMT -5
shotgunner: Diane go say hi to Don. I bet hE'd like a hug from a young woman.
Oct 8, 2015 15:35:31 GMT -5
jakesrocks: Dang, if a young woman hugged me, I'd probably keel over dead.
Oct 8, 2015 15:54:35 GMT -5
mr.mohs: on the 12th day of Q my true rock pal gave to me...now you started something Sheri
Oct 8, 2015 16:39:32 GMT -5
drocknut: Sorry Don, I'm renting a uhaul trailer and only have 5 days to get it back and turned in in Arizona. Wouldn't want you to keel over ya know ;-)
Oct 8, 2015 20:32:43 GMT -5
mr.mohs: don't overload that trailer with too much rock weight... rolling into Q ?
Oct 8, 2015 20:51:17 GMT -5
jakesrocks: Heck girl, I was gonna load ya up with 3 or 4 buckets of rock, and all the fresh hot coffee ya can handle. And Jake was gonna wash the road dust off your neck & ears.
Oct 8, 2015 20:59:20 GMT -5
shotgunner: Dang Diane, if Don were to really step up and offer a nice home cooked meal, you would HAVE to go!
Oct 8, 2015 22:31:00 GMT -5
jakesrocks: Maybe my chicken n rice dish. Everybody who's tried it likes it.
Oct 8, 2015 22:42:21 GMT -5
jakesrocks: Night all. Gonna hit it early tonight.
Oct 8, 2015 22:43:45 GMT -5