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