chalcedony
US /kælˈsɛd.ə.ni/
UK /kælˈsɛd.ə.ni/
名詞
玉髓
a translucent to transparent cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite
範例:
•
The ancient Egyptians used chalcedony for carving scarabs and seals.
古埃及人使用玉髓雕刻聖甲蟲和印章。
•
She wore a necklace with a beautiful blue chalcedony pendant.
她戴著一條帶有美麗藍色玉髓吊墜的項鍊。