Thank you for submitting your item for appraisal. This appears to be a chinese aventurine Carving of a carp, depicted as if just about to jump out of the water. The chinese word for fish is a homophone of the word for "affluence" and "abundance". A leaping carp is associated with success in civil service examinations. The estimate is based on similar 20th century stone carvings offered or sold at auction. There is no measurement for the sentimental value you might attach to it.