Thread: What is the Sp Gr of Your Best Arkansas Stone

I take a razor and put it on a stone. It either works well or it doesn't, some are better than others. Like the old watchmaker told me when I asked him if 'this' is a good watch. Does it keep good time, he said, if it keeps good time it is a good watch.

Ah, but then there are watchmakers and there are watchmakers, Jimmy!

My dads friend took a watch into a jewellers near where they were working. It had a fault and wouldn't wind.

My dads friend said 'can you have a look at this watch, mate' and gave it to the jeweller.

The jeweller, being a bit of a wiseacre, said 'Very nice' and handed it back.

Not to be outdone, dad and his friend turned round and walked out the shop. They never went back.

And the moral of this story is, er, is there one? Tom will know.

Regards,
Neil

Originally Posted by Neil Miller

And the moral of this story is, er, is there one? Tom will know.

Regards,
Neil

Certainly, Mr. Miller!

Originally Posted by sharptonn

Certainly, Mr. Miller!

I knew there was a point! Just like the moral of your story, I have been ?@2$*! for a very long time indeed.

Regards,
Neil

Originally Posted by sharptonn

Certainly, Mr. Miller!

But which one did the gravity test… and on what?

Originally Posted by Euclid440

But which one did the gravity test… and on what?

Well....it is a proven fact that gravity sucks!

If you were doing a scientific treatise on specific gravity and were trying to correlate it to hardness you would be in big trouble. Diamond has a S.G of around 3.4 or so and the main ore of lead (Galena) has one of around 7.5 or so. The lead has a hardness of about 1.5 and Diamond, well you know.

The basic properties that give a high S.G are usually quite different from those that make it hard.

Originally Posted by thebigspendur

If you were doing a scientific treatise on specific gravity and were trying to correlate it to hardness you would be in big trouble. Diamond has a S.G of around 3.4 or so and the main ore of lead (Galena) has one of around 7.5 or so. The lead has a hardness of about 1.5 and Diamond, well you know.

The basic properties that give a high S.G are usually quite different from those that make it hard.

Dang! Just when I thought I understood!

Originally Posted by thebigspendur

If you were doing a scientific treatise on specific gravity and were trying to correlate it to hardness you would be in big trouble. Diamond has a S.G of around 3.4 or so and the main ore of lead (Galena) has one of around 7.5 or so. The lead has a hardness of about 1.5 and Diamond, well you know.

The basic properties that give a high S.G are usually quite different from those that make it hard.

But it is not designed for that purpose, so you would be a bit foolish to use it in that way.

Dave's post on the previous page sums it quite succinctly, it is to highlight differences within the same group when used by people like Dan, to determine differences etween a group of novaculites.

Bearing in mind that each mineral has a specific mass that does not correlate with any other mineral should make us wary of using it to debate the virtues of apples as opposed to oranges, let alone write a treatise based on the folly of doing so.

Regards,
Neil

Originally Posted by JimmyHAD

I take a razor and put it on a stone. It either works well or it doesn't.

This is the best test, above and beyond SG (I guess the SG does, though, at least confirm that you're getting what you've paid for).