Karen,

    If it is a true white granite it is going to be composed of quartz and
feldspar only, while ironstone is a rock containing at least fifteen percent
iron. Ironstone forms in igneous rocks through mahmatic differentiation -
dense heavy minerals such as magnetite crystallize first and sink to the
base of the molten magma to form an iron-rich layer. Ironstone also forms in
sedimentary rocks such as limestone and sandstone. All this information is
courtesy of my wife, the Geologist.

    Josh Brinker


----- Original Message -----
From: "Karen Carey" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, December 29, 2003 3:18 PM


> What is the difference between white granite and ironstone?  The more
articles I read, the more confused I get.
>
>
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