labradorite
A feldspar mineral known for its iridescent play of colors; used in jewelry and ornamental stone.
Labradorite exhibits a beautiful luster called labradorescence.
The Japanese name 曹灰長石 is a compound of 曹 (soda), 灰 (lime), and 長石 (feldspar), reflecting its composition as a plagioclase feldspar rich in sodium and calcium.