夜明珠一对:夜明珠是一种稀有的宝石，古称“随珠”、“悬珠”、“垂棘”、“明月珠”等。通常情况下所说的夜明珠是指荧光石、夜光石。它是地球大地内的一些发光物质经过了几千万年，由最初的火山岩浆喷发，到后来的地质运动，集聚于矿石中而成，含有这些发光稀有元素的石头，经过加工，就是人们所说的夜明珠，常有黄绿、浅蓝、橙红等颜色，把荧光石放到白色荧光灯下照一照，它就会发出美丽的荧光，这种发光性明显的表现为昼弱夜强。此外，部分工艺品也利用萤石的特征制作一些冠以“夜明珠”名称的饰品。“夜明珠”是在黑暗中，人眼能明视的，天然的、能自行发光的珠宝。

Night pearls: Night pearls are a rare gemstone. They are called "with pearls", "hanging pearls", "spines" and "moon pearls" in ancient times. Usually the nocturnal pearl refers to fluorite and noctilucent stone. In addition, some handicraft products also use the characteristics of fluorite to make some ornaments with the name "night pearl". "Night Pearl" is a jewelry that can be seen by human eyes in the dark, natural and self-luminous.