turquoise = τιρκουάζ (ή τυρκουάζ), κάλαϊς (ή κάλλαϊς ή καλλαΐτης), κν. γαλαζόπετρα, γυαλόπετρα, περουζές.
The substance has been known by many names, but the word turquoise, which dates to the 16th century, is derived from an Old French word for "Turkish", because the mineral was first brought...