Crystal Moon by Addison Carmichael

DO YOU BELIEVE IN MAGIC?

Geologist Jillian Azure wakes from a coma to a life she doesn’t remember, recognize or even want. In fact, the only thing that seems real is the darkly attractive Marc Zander who performs magic and miracles and who claims to have woken her from a death-sleep curse cast on her by an unknown enemy mage determined to stop her from becoming a powerful sorceress and igniting the Red Moon Prophecy because she is the “third key”.
And oh yeah, he’s also the love of her life sent by herself from the future.

This unbelievable time-traveler gives Jillian a rose quartz crystal and instructs her to “follow the bread crumbs”, to find him in her present time. It will be the only way she will discover her true gifts, then join with her two as yet unknown sisters to fulfill the ancient prophecy and steer the world into an age of true peace.
Then Marc disappears into a vortex of smoke to return to his own time, leaving Jillian stunned, confused, and horribly alone to solve this puzzle.

It’s then she discovers her first “bread crumb”—a note from her old college friend who is now a geoscience professor at the University of Colorado in Fort Collins who has invited her to come up and see something she found, “something amazing.”
There Jillian finds her second bread crumb—Marc Zander himself, who doesn’t have a clue as to who she is, even after she walks up and kisses him.