Calcite,
One of the most common minerals on Earth, has a lot of discoloration of the bright yellow, orange, gold, red, sky blue and the light to leaf-green color. Calcite is a widely occurring mineral in large masses, each of you will regain its color. In esoteric Calcite is used for example to enhance memory clear, orange to impulsive acts for inspiration yellow, green to calm and harmony, blue for communication support. Interesting is pink manganokalcit that look slightly different from other kinds of color.