Which Ruby is that? Mystery Cache

The cache is located along Sacramento Avenue in southern Sutter County. You can drive right to it, after solving the puzzle below.

The formula for determining the coordinates is N 38 54.ABC  W 121 35.DEF.

A. Kenny sang, "Don't take your _____ to town." (half)

B. He shot a presidential assassin in Texas. (2nd letter)

C. She starred in "A Raisin in the Sun," and "Do the Right Thing."

D. Ms Keeler made musical films with ____ Powell.

E. its number on the Moh's Hardness Scale (-1)

F. its birthstone Zodiac sign (+4)

You can validate your puzzle solution with certitude.