selagine

例句：

1. 1. The selagine is a rare and precious gemstone.
   这个宝石非常稀有且珍贵。
2. 2. Selagine is often used in jewelry design to add a touch of elegance.
   在珠宝设计中，selagine常被用来增添优雅感。
3. 3. The selagine has been found in ancient civilizations, suggesting its long history.
   这种宝石在古代文明中被发现，暗示了其悠久的历史。