o·pal
noun/ˈəʊpl/
/ˈəʊpl/
[countable, uncountable]- a white or almost clear semi-precious stone in which changes of colour are seen, used in jewellery
欧泊；蛋白石 - an opal ring
蛋白石戒指
Word Originlate 16th cent.: from French opale or Latin opalus, probably based on Sanskrit upala ‘precious stone’ (the stone was first brought from India). - an opal ring