Beads, 3mm Faceted Red Onyx Beads on Heart Clasp 16-18"
Note the clasp is a heart and the extender chain is tiny hearts.
Red Onyx is related to your Root Chakra. It has the healing meanings that are inherent to any color of Onyx. Onyx is strength-giving, providing support in difficult or confusing times, as well as during times of enormous mental or physical stress.
Agate and onyx are both varieties of layered chalcedony that differ only in the form of the bands: agate has curved bands and onyx has parallel bands. The colors of its bands range from black to almost every color. Commonly, specimens of onyx contains bands of Black and White.
What a lovely girlfriend gift!