Also turquois.an opaque mineral, a basic hydrous copper aluminum phosphate often containing a small amount of iron, sky-blue or greenish-blue in color, cut cabochon as a gem.Compare bone turquoise.
Also called turquoise blue . a greenish blue or bluish green.
Origin of turquoise
1350–1400; <French: Turkish (stone), equivalent to TurcTurk + -oise, feminine of -ois-ese; replacing Middle English turkeis<Middle French
A photo from last July shows Stewart immersed in the turquoise water of the Bahamas, head tilted back toward the sun, wet hair draped over her shoulders.
Her Stepfather Admitted to Sexually Abusing Her. That Wasn’t Enough to Keep Her Safe.|by Nadia Sussman|September 18, 2020|ProPublica
We each designed half the backgrounds, all in turquoise, and each animated one character.
The adventure of the morning had left its impression upon both of them, and Eileen wore the gold chain with its turquoise pendant.
The Haunting of Low Fennel|Sax Rohmer
Then she took from her open jewel case, two gold pins set with turquoise, and fastened the arrangement securely.
I, Thou, and the Other One|Amelia Edith Huddleston Barr
British Dictionary definitions for turquoise
turquoise
/ (ˈtɜːkwɔɪz, -kwɑːz) /
noun
a greenish-blue fine-grained secondary mineral consisting of hydrated copper aluminium phosphate. It occurs in igneous rocks rich in aluminium and is used as a gemstone. Formula: CuAl 6 (PO 4) 4 (OH) 8 .4H 2 O
A blue to bluish-green or yellowish-green triclinic mineral that occurs in reniform (kidney-shaped) masses with surfaces shaped like a bunch of grapes, especially in aluminum-rich igneous rocks such as trachyte. In its polished blue form it is prized as a gem. Chemical formula: CuAl6(PO4)4(OH)8·5H2O