How much is a 6 inch black stone carving worth?

The value of a 6-inch black stone carving can vary widely based on factors such as the type of stone, the intricacy of the carving, the artist's reputation, and market demand. Generally, it could range from $50 to several hundred dollars. For more precise valuation, it's best to consult an appraiser or look at similar pieces sold in galleries or online.