Day 7 is a book about a Diamond, seeing as the Diamond is the April Birthstone.
Upon researching for a book with a diamond I came across a series that I have never heard of before but seems quite interesting.
It is called the Unaltered Series by Lorena Angell.
So far there are four installments, A Diamond In My Pocket, A Diamond In My Heart, The Diamond of Freedom, and The Diamond Bearers' Destiny.
Here the Goodreads synopsis of the first one "A Diamond In My Pocket".
"When Calli Courtnae breaks the World Record for the 100m, she is invited to Montana to prepare for National tryouts. However, upon arrival using her lip reading ability she realizes she’s been lied to, or at least not told the whole truth. She's a superhuman, a Runner, and her new world includes transporting packages for other supernatural groups.
She’s paired up with an overly anxious Gothic roommate, is continuously glared down by the gorgeous top-dog, Chris, who feels she doesn’t belong, and is placed on a delivery team to transport a valuable magical diamond to a clan of terrorists who can kill with their thoughts.
Chris, the team leader, is given the diamond, but Calli secretly receives the real stone along with a vision of the future and an explanation of why she was hand selected to carry out the mission. Almost immediately the hidden diamond oozes unprecedented additional powers and abilities in Calli making her more sought after than the diamond itself."
So, these books are definitely going on my to be read list!