Moh's Gemstone Scale of Hardness

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connrock still telling self it's just a hobby Ranger,,,My little buddy Member since July 2004 Posts: 4,374	Moh's Gemstone Scale of Hardness Jan 25, 2005 21:13:18 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by connrock on Jan 25, 2005 21:13:18 GMT -5 I find this scale a lot more usefull to tumbling then the common Moh's scale that we see. www.orionsgemz.com/Mohs.html Tom
	Beacon Falls,CT

Tweetiepy
gets rocks for Christmas

Always looking in the wrong places...

Member since January 2005
Posts: 5,421

Moh's Gemstone Scale of Hardness Jan 26, 2005 9:37:08 GMT -5

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Post by Tweetiepy on Jan 26, 2005 9:37:08 GMT -5

Hi Connrock,

Thanks for that link. One newbie questions: how do I use this table when tumbling (what does it mean? Anything over a 5 can be tumbled no problem & will take a nice polish?) Sorry for my ignorance it's hereditary.

Rose
Cave Dweller

Member since November 2004
Posts: 875

Moh's Gemstone Scale of Hardness Jan 26, 2005 9:52:55 GMT -5

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Post by Rose on Jan 26, 2005 9:52:55 GMT -5

Its a scale of hardness - so if you put something of 7 (quartz) hardness in with something of 4 or 5 (malachite). The malachite would likely get scratched, by the quartz and come out dullish.

Rocks of less than 5 can be tumbled, but with other rocks of similar hardness.

Last Edit: Jan 26, 2005 10:00:20 GMT -5 by Rose

Tweetiepy
gets rocks for Christmas

Always looking in the wrong places...

Member since January 2005
Posts: 5,421

Moh's Gemstone Scale of Hardness Jan 26, 2005 9:59:19 GMT -5

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Post by Tweetiepy on Jan 26, 2005 9:59:19 GMT -5

Does it impact whether or not the stone will take a polish or not? I have some stones that were in the rough for only a short time - they were already smooth after that - they're in polish now, but I'm not sure they'll shine up real nice because of that.

Is there a number difference that can be put together? like one number difference (4 & 5) will go together but not two (4 & 6)?

Rose Cave Dweller Member since November 2004 Posts: 875	Moh's Gemstone Scale of Hardness Jan 26, 2005 10:01:37 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Rose on Jan 26, 2005 10:01:37 GMT -5 I asked on the forum about this the other week and got some really helpful advise. Here is the thread andy321.proboards16.com/index.cgi?board=general&action=display&thread=1105980753
	Last Edit: Jan 26, 2005 10:07:43 GMT -5 by Rose

Tweetiepy gets rocks for Christmas Always looking in the wrong places... Member since January 2005 Posts: 5,421	Moh's Gemstone Scale of Hardness Jan 26, 2005 10:09:42 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Tweetiepy on Jan 26, 2005 10:09:42 GMT -5 Thanks for your help Rose. I hope this helps me in my next batch

MichiganRocks
starting to spend too much on rocks

"I wasn't born to follow."

Member since April 2007
Posts: 154

Moh's Gemstone Scale of Hardness Jan 26, 2005 17:12:40 GMT -5

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Post by MichiganRocks on Jan 26, 2005 17:12:40 GMT -5

Hey Tweetiepy, the time recomendations given are generally for rocks of 6.5 -7.5 hardness. As you drop down in hardness, the time the rocks are left in each sequence will be shorter. In fact, while 6.5 - 7.5 would run for 7 days, I would only run for 4 days with a load of 5.5 - 6.5 rocks. You don't need any more time or work done than is necessary to make the rocks shape like you want. From there, it's just a polish cycle. Softer rocks very suscepible to damage to be sure and use something to cushion them.

Ron

Hey buddy, what's with the axe?

Tweetiepy
gets rocks for Christmas

Always looking in the wrong places...

Member since January 2005
Posts: 5,421

Moh's Gemstone Scale of Hardness Jan 26, 2005 17:59:01 GMT -5

Quote

Post by Tweetiepy on Jan 26, 2005 17:59:01 GMT -5

Like I mentioned, I had some rocks that were done in rough after 4 days and I put them in polish a few days ago. I added cut-up pieces of elastics - hopefully that will help them out. I'm anxious to have a look at what I got. (I hafta peek ever 2 days or so - specially in the polish stage - I've been pretty good for the other stages).

Now if I can only get my shipment of mexican lace......

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