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

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

.....orapples????

Originally Posted by sharptonn

.....orapples????

...pineberries...

What neal said. When you're comparing novaculite to novaculite, it's a pretty good indicator (not of hardness, but fineness due to lack of open space in the stone matrix). When you're comparing diamonds to novaculite, it's ...well, I don't know what it is.