rhigolene

例句：

1. 1. The rhigolene is a rare and valuable mineral.
   瑞格龙是一种稀有且有价值的矿物。
2. 2. Rhigolene is often used in cosmetics to enhance skin tone.
   瑞格龙常用于化妆品中，以增强肤色。
3. 3. In ancient times, rhigolene was believed to have medicinal properties.
   古代，人们认为瑞格龙具有药用价值。