diamond and sapphire powder usage

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erin at Mamas Minerals
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diamond and sapphire powder usage Feb 4, 2005 13:18:57 GMT -5

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Post by erin at Mamas Minerals on Feb 4, 2005 13:18:57 GMT -5

Hi All --

Thanks to everyone who helped with info about Boron Carbide and Green Silicon Carbide. Now I have another (related) question. . . .

Could someone direct me towards information on how to use diamond powder for tumbling corundum? My supervisor has looked online for guidelines and in the books we have, and found nothing. What we need is how much to use, and any ways in which the process varies from a regular tumbling process with Silicon Carbide. Hints from the experts, please!

Another question. I've been told that sapphire powder can be used to tumble polish corundum. I don't understand how this can work, if sapphire is the same hardness as what's being tumbled. Is there just a slight increase in hardness, or is there something else at work here? I'm leery of recommending this solution to customers when I'm not sure how it works.

Thanks much in advance.
Happy tumbling!
erin
MamasMinerals.com

MichiganRocks
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diamond and sapphire powder usage Feb 4, 2005 14:02:45 GMT -5

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Post by MichiganRocks on Feb 4, 2005 14:02:45 GMT -5

Hey Erin,

I also went down that road. Be very careful about trying to tumble with diamond powder. I almost did it, but when Doc pointed out that "diamond is forever", I reconsidered. Silicon grit will embed in the barrel lining but it breaks down quickly. Diamond will embed, but it won't break down. You could ruin the barrel for doing anything else.

Ron

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sandsman1
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diamond and sapphire powder usage Feb 4, 2005 15:54:44 GMT -5

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Post by sandsman1 on Feb 4, 2005 15:54:44 GMT -5

hi erin i dont know anything about useing them iv never tried eather one ,, but i had to butt in and say thanks for the cool chunks of glass you picked out for me i like them and cant wait to slice them up and try some shapes hahaha seeya ---john

GOT TO KEEP THE LOONEYS ONNNN THE PATH
john-- NOMAD--- U.S.A. -- IN GOD WE TRUST

krazydiamond
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diamond and sapphire powder usage Feb 4, 2005 19:53:35 GMT -5

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Post by krazydiamond on Feb 4, 2005 19:53:35 GMT -5

yeh, i wouldn't recommend either diamond or sapphire powder for tumbling..cabbing or faceting, perhaps.

lots of time with lots of grit (silicon carbide/Boron) with lots of other corundum, eventually it has to do the work? i did some garnet over a long tumble and it shaped and polished..that is corundum, yes?

let us know how it goes, Erin,

KD

Last Edit: Feb 4, 2005 19:56:23 GMT -5 by krazydiamond

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docone31
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diamond and sapphire powder usage Feb 7, 2005 23:11:08 GMT -5

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Post by docone31 on Feb 7, 2005 23:11:08 GMT -5

This is intended to be one shot posts. However, I use diamond powder and spray for polishing my faceting. It is lightly spread on a ceramic lap and imbedded. It also works on tin laps, and iron laps. It is NOT intended for tumbling.
The only time I would use diamond powder is if I had an intended drum, or a PVC drum for ONLY this use.
A diamond is a bear. I work on settings that have diamonds. The hardness enables the stone to cut through the prong just with normal wear. It can also burrow through rubber drums. It will imbed and show up time after time. It it is a 50 micron grit, no issue there, if it is a 220 mesh, or 660 mesh. It will ruin any polish attempt in that bbl.

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