Colour doesn't matter
A) Limestones come in a range different colours here on Earth
B) We have a probe that can tell the mineralogy.
Hold your horses before declaring it to be limestone or gypsum........
Space/Science » in reply to From it's light color it's possible it is limestone. (Another reason why accurate color is important.)
A) Limestones come in a range different colours here on Earth
B) We have a probe that can tell the mineralogy.
Hold your horses before declaring it to be limestone or gypsum........