Thanks for decent photos, but please provide fields of view so we know what "super tiny" actually is. Never too small for an ID! Also descriptors like road cut or mine dump alone dont really help us, we need geological context - what kind of rock, what kind of mine, what rock type hosts the ore, etc. Minerals are products of their environment of formation, knowing that helps reduce the possibilities.

Specimen A does look like epidote/clinozoisite, but also could be scapolite or vesuvianite or even axinite. Does it fluoresce? Scapolite is commonly pinkish under short-wave.

Specimen B probably calcite/aragonite, as suggested, try some acid on it. May also fluoresce orange-red or yellow-white.

Specimen C could be zircon, these commonly fluoresce yellow. Maybe monazite.