Joy
having dreams about rocks
Member since September 2005
Posts: 69
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Post by Joy on Jan 13, 2006 22:04:14 GMT -5
This picture library is such a cool idea. It's really helpful to a "newbie" like me. When you add a picture would you all also indicate the MOHS scale (hardness), if you know it? It would be really helpful for tumbling different rocks together.
many thanks! joy
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jlc0321
spending too much on rocks
Member since September 2005
Posts: 408
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Post by jlc0321 on Jan 13, 2006 23:03:24 GMT -5
Good Idea!  |
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Post by rockds on Jan 14, 2006 1:36:06 GMT -5
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stefan
Cave Dweller 
Member since January 2005
Posts: 14,113
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Post by stefan on Jan 16, 2006 14:48:04 GMT -5
Love the idea- I'll modify my post!
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kad
off to a rocking start
Member since March 2006
Posts: 2
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Post by kad on Mar 12, 2006 12:31:02 GMT -5
I just browsed the minerals site link posted, thanks so much!!!!!
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Post by deb193 on Mar 13, 2006 21:02:56 GMT -5
The thing is most agate and jasper is between 6.5 an 7.0 and stuff from the same site is not always homogeneous.
I alwayslook for something that tells me which picture jaspers are softer and which are harder. Often there is just a 7.0 given.
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bob7197
off to a rocking start
Member since March 2006
Posts: 5
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Post by bob7197 on Mar 21, 2006 9:59:15 GMT -5
Hi: I have some answers for you, but can't be sure what you are asking for. the Mohs scale? the Relative Hardness scale? or maybe some specific information about "hardness" which is a very imprecise term, rather dependant on the method and rock you are working. "Toughness" comes into consideration as well. Agate at around 7 (Mohs) is much more difficult to work than quartz, also hardness 7.
Let me know. I have some web addresses that might be of help plus some text.
Bob
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