IPA: /ˌækwəˈmɛːriːn/
KK: /ˌækwəˈmɛrin/
A type of gemstone that is a light blue or greenish-blue color, often used in jewelry.
She wore a beautiful aquamarine ring on her finger.
Aquamarine is formed from "aqua" (from Latin *aqua*, meaning water) and "marina" (from Latin *marinus*, meaning of the sea). The word describes a color reminiscent of the sea or water, specifically a bluish-green hue.
Think of 'water' ('aqua') and 'of the sea' ('marina') to remember that aquamarine refers to a color that resembles the sea.