turquoise
noun
[ ˈtəːkwɔɪz ]
• a greenish-blue colour.
• "the turquoise waters of the bay"
• a semi-precious stone, typically opaque and of a greenish-blue or sky-blue colour, consisting of a hydrated phosphate of copper and aluminium.
Origin:
late Middle English: from Old French turqueise ‘Turkish (stone)’.
