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What makes marble hard or soft?

Stone Conversations : Archive 1 : Message 00816

From: Tim Palmer <tjp@xxxxxxxxxx>
Date: Tue, 06 Mar 2001 10:43:23
Subject: What makes marble hard or soft?

The sizes of the individual calcite crystals, the extent to which they are
tightly intergrown within the rock, the residual porosity, and the
percentage of impurities all contribute.

At 21:25 05/03/01 -0800, you wrote:

Quoted text begins.What determines the hardness of marble?
End of quote.


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