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
Fossilman: OMG me arden los ojos!!! Don....LOL
Apr 24, 2015 14:15:09 GMT -5
jakesrocks: Hey Ed, I used a red pencil, just in case.
Apr 24, 2015 14:17:39 GMT -5
jakesrocks: Hey Mike, just scored a killer chunk of gem dino bone, and a face polished hunk of pet wood from the Boron Dry Lake, Ca. area to add to my Boron collection.
Apr 24, 2015 14:19:48 GMT -5
jakesrocks: Hey Mike, no arden los ojos. More like Mi culo se quema. LOL
Apr 24, 2015 14:55:33 GMT -5
mr.mohs: glutmus Fuego ! chili today- hot tamale
Apr 24, 2015 15:09:31 GMT -5
Fossilman: Is it Mexican food week-I made Tijiuana crock pot pie the othe day......................But it's all right,everything came out ok!!!!!!!!!! LMAO
Apr 24, 2015 18:50:10 GMT -5
Fossilman: Don,did ya' post the dino bone and wood yet or is it coming in the mail?
Apr 24, 2015 18:51:01 GMT -5
jakesrocks: Hey Mike, I posted a link to the bone on the Theropod vs Sauropod thread. Just bought the danged things this morning. Probably be Tuesday or Wednesday before they get here.
Apr 24, 2015 21:09:11 GMT -5