From:
John Twilley <jtwilley@xxxxxxxxxxx>
Date:
Sat, 14 Jul 2001 14:52:28 -0400
Subject:
name that stone
Tom,
A right angle fracture such as you describe is not
typical for quartz (which has a conchoidal fracture that
will be visible if a large crystal, and made up of
multiple intersecting conchoidal fractures, if a poly-
crystalline lump of quartz.) What you are describing
might be a type of feldspar with cleavages close to 90
degrees. Fluorite is a cubic mineral with right angle
fractures but is not very hard.
John Twilley
Tom Brickman wrote:
Quoted text begins.I'm not a stone worker (a forester) but what you describe sounds like
quartz - though being a stone worker, I'm sure you would recognize quartz.
End of quote.
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