opal
/ˈəʊpəl/
B1 · Intermediate★★☆☆☆
Simple Meaning
一种用于珠宝的闪亮彩色石头
When to Use
💬Daily Conversation📱Social Media
Intermediate — can handle common situations
Examples in Conversation
“她的戒指上有一颗美丽的蛋白石，在光线下会变色。”
“我想给妈妈买一条蛋白石项链作为生日礼物。”
Learning Path
▶Full Definition
A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity, of the chemical formula SiO2·nH2O.