1. Scarcity: The output of jet in Taiwan Province Province is limited and the quantity is scarce, so it is more precious.
2. Color and texture: jet in Taiwan Province Province is usually dark green or black, with unique texture and luster. The depth of color and the aesthetic degree of texture will affect its value.
3. Cleanliness: The cleanliness of jet in Taiwan Province Province can measure the number of inclusions and defects inside it. The higher the clarity, the higher the value of jet.
4. Shape and cutting: jet in Taiwan Province Province is usually processed into jewels of various shapes, and the fineness of cutting and attractive shape will also affect its value.
5. Transparency: The transparency of jet will also affect its value. The higher the transparency, the higher the value of jet.
6. Origin and history: Taiwan Province black jade has unique regional characteristics and historical and cultural background, so it has certain cultural and historical value, which will also affect its market price.
To sum up, jet in Taiwan Province Province has high market value because of its scarcity, unique color, texture and luster, and unique cultural and historical background from Taiwan Province Province.