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
Shotgunner: hmmm.... good to know Jim has a 12" saw. Must remember for future discussions.....
Aug 29, 2014 22:30:25 GMT -5
Shotgunner: Ohhh!!! Russ has an 18"!! wooohooo!!
Aug 29, 2014 22:30:43 GMT -5
nowyo: Yeah, I do. Got it home tonight. It was in the cellar of a farmhouse. Had to mostly disassemble it to get it through the door and up the stairs. The things we do for fun. I'll put it back together tomorrow night. Bet it hasn't been used in 30 yrs.
Aug 29, 2014 23:01:19 GMT -5
Rockoonz: It aint a big rock saw till you measure blade size in feet
Aug 30, 2014 0:02:45 GMT -5
Shotgunner: I did see a 4 foot oil saw recently. Same dude has a 12 foot cable saw....
Aug 30, 2014 11:09:24 GMT -5
wampidy: It ain't a big rock saw till you measure blade cost in thousands could be another way to put it. I can not imagine the cost of a 3 to 4 foot blade. We are talking a circumference of over 9 and 12 feet. That is a whole pile of diamonds.
Aug 30, 2014 16:21:44 GMT -5
Shotgunner: 48" x 0.257" segmented blade = $2700, cutting with biodiesel lasts years - as I am told
Aug 30, 2014 16:38:37 GMT -5
mr.mohs: this shouting reminds me of the $75,000 rock!...you guys remember that?
Aug 30, 2014 19:45:21 GMT -5
nowyo: Heck, I've got one of those right here in the yard! You got the cash? Take your pick! Any rock in the yard! Hell, all the rocks in the yard!
Aug 30, 2014 23:03:08 GMT -5
mr.mohs: post a picture!
Aug 30, 2014 23:39:42 GMT -5
Shotgunner: Wifey bought a tritip at Costco - smoking it now............ too early for beer
Aug 31, 2014 11:20:08 GMT -5
Fossilman: Scott,we had BBQ-ed tritip at the brother in laws lastnite...Great eating...
Aug 31, 2014 16:50:21 GMT -5
Shotgunner: Awesome Mike. Glad yours was good. Windy here and could not keep the fire going right. Mine was weaksauce.
Aug 31, 2014 18:19:01 GMT -5
kk: Scott if we talking about BBQ, the easiest starter regardless to wind-conditions: tissue with a little cooking-oil! Never leave home without it.
Aug 31, 2014 20:48:30 GMT -5
naynay777: How do you tumble Amber? I can't do it by hand, as I have Arthritis, can it be done, in a tumbler, fro 30 minutes, or less????
Aug 31, 2014 22:13:50 GMT -5
naynay777: If anyone, can help me, I would be ever so Thankful!
Aug 31, 2014 22:15:40 GMT -5
Fossilman: Naynay go to the Tumble forum on the top of the forum page,you will get all the help you need there-Thumbs up
Aug 31, 2014 22:58:50 GMT -5
Jugglerguy: Today I'm seeing that a "guest" has posted, but I can't see the guest's posts. Anyone know if I can change a setting somewhere to se posts by guests?
Sept 1, 2014 11:16:48 GMT -5
rockpickerforever: Yeah, that is kinda weird. It seems there have been some hiccups here in the last day or so, hope nothing bad is going on.
Sept 1, 2014 11:39:04 GMT -5
Shotgunner: Kurt, I do start my fires with corn oil. B ut ya cant wook that way for the greasy smoke and the wood wouldn't stay lit
Sept 1, 2014 14:45:55 GMT -5