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
bigfoot: Finally getting up to speed, I hope!
Dec 14, 2014 19:01:41 GMT -5
1dave: Hi bigfoot, good to see you here! Show these good folks your horse head carvings!
Dec 14, 2014 21:25:33 GMT -5
Fossilman: Hurt my leg the other day on a roof,but still going to cut rocks today...Thumbs up
Dec 15, 2014 12:38:26 GMT -5
captbob: We seem to be missing a thread ...
Dec 15, 2014 23:42:42 GMT -5
rockpickerforever: I iz returned. Wascally wock hunt successful! A few fossils from OW; a little of everything, and a lot of palm bog agate from Indian Pass. 100+ lb boulder of yellow agate, sounded like glass when I rolled it up the hill, lol. Pics coming soon...
Dec 16, 2014 5:05:11 GMT -5
Fossilman: Jean SCORES!!!!! Cool beans and a thumbs up..............
Dec 16, 2014 11:07:11 GMT -5
Fossilman: Well rocks yesterday,woodworking today.Have a great day my friends!!
Dec 16, 2014 13:40:30 GMT -5
drocknut: Sorry you hurt your leg Fossilman. Welcome back you wrascally wock hunter. Looking forward to pics. Glad you had a successful hunt.
Dec 16, 2014 14:52:06 GMT -5
rockpickerforever: Thanks, Diane. If the weather cooperates, will get picks tomorrow. Mike, what did you hurt your leg fur? Thought you knew better than that! Hope it doesn't keep you down, and gets better soon.
Dec 16, 2014 16:06:31 GMT -5
Fossilman: No worries,it's getting better,will be doing the jig,soon....LOL
Dec 16, 2014 19:27:37 GMT -5
drocknut: Doing the jig is probably what hurt it in the first place. .lol
Dec 16, 2014 23:26:16 GMT -5
Fossilman: Falling off the ladder working on the church steeple did that-LOL............Caught myself before I hit the bottom of the ladder...Rolling eyes..
Dec 17, 2014 0:39:26 GMT -5
drocknut: Glad it wasn't worse
Dec 17, 2014 21:22:15 GMT -5
mtmadman: hey hey every body im baaaaaach
Dec 19, 2014 19:10:01 GMT -5
Fossilman: Oh oh Bob is back.....Where you at now buddy? Close to Montana are ya'.....?
Dec 19, 2014 21:53:43 GMT -5
drocknut: Welcome back
Dec 19, 2014 23:40:33 GMT -5
catmandewe: Good to see ya Bob!
Dec 20, 2014 11:47:11 GMT -5
adam: Agate hunters--woohoo!
Dec 20, 2014 18:48:13 GMT -5