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Rubellite tourmaline from upscale auction house

 a 22.75 carat Rubellite Tourmaline at an upscale auction >a
general sense of where the price per carat can fall on >these
stones would be incredibly helpful in determining whether or >not
to go the GIA route. From USD$ 250.00/carat to USD$ 650.00/carat
the stone itself is absolutely clean - not a single imperfection
eye or under loupe. 

That would put it in the up to USD$ 650.00/carat area.

A GIA cert will not give you any price - just certify
that it is indeed tourmaline. An AGL cert may be a good bit cheaper
and just as acceptable.

Best regards,
Robert P. Lowe Jr.