"Jade" is a cultural term used for a translucent gem material consisting of either jadeite or nephrite. The typical color cut into gemstones and used in ornamental work is a bright to deep green. However, jade can be white, pink, purple, gray, black, or other colors. Jade is a durable stone, well suited for use in jewelry. During ancient human history, jade's durability made it the material of choice for tools and weapons that were used for cutting and impact. It could be fashioned into sharp tools and had a very high resistance to breakage (also known as "toughness").