How much a point .27 carat AAA1 flawless Caribe Diamond is worth?

Your diamond may be a black diamond, if it's a diamond. There is a black diamond scale which ranks stones with AAA grades.

Diamonds that are flawless are labeled IF for internally flawless, or FL for flawless.

This stone could also be something other than a diamond.

Only a gemologist can give you the value, based on its cut and determination of how the stone achieved its colour.