QUOTE (in "Large clean chrysoberyls sells for around USD 200.00 per carat" by Marisa Spano on Apr 11 2009, 12:49 PM)
It does look like a chrysoberyl. And it's really big. You need to get a strong fiber optic light and shine it through the stone to see if it's clean or if it changes color.
It doesn't look clean from the picture but some parts of it could be clean. Large clean chrysoberyls sells for around USD 200.00 per carat. (25cts.+) If not clean, they have to be very inexpensive like USD 10.00 per carat.
If it shows a decent color change, then you can cut some alexandrites and those don't need to be clean but the color of that rough doesn't look like it's alexandrite.
What kind of light did you shoot with?