Turquoise (noun)

1. A blue-to-green mineral that is a hydrous phosphate of copper and aluminum and is used as a gemstone.
2. A greenish-blue color like that of turquoise.

Origin:

Early 16th century: from french turquois, from old french turques, from turkish turkuaz, from french pierre tourques 'turkish stone'.

Examples:

1. The necklace was made of turquoise beads.
2. The ring had a large turquoise stone set in silver.
3. The artist used a shade of turquoise to paint the ocean.
4. The turquoise mineral was valued for its beauty and rarity.
5. The turquoise color of the walls made the room feel cool and inviting.