[meteorite-list] Help me Identify this Impact Melt Material

[bobadebt at ec.rr.com]

A while back someone sent me a very dense solid tan-ish white impact melt 
sample.

I would like to make it into a sphere but I need to know what it is first.

If you know impact melts and wouldn't mind taking a stab at it, please 
contact me for pictures,.

I have more then I need for my sphere so I would be happy to send you some

Thanks