Three of Pentacles

Upright

craft · collaboration · competence

Skilled people building something together, each doing the part they are good at.

Reversed

mediocrity · friction · unrecognised skill

Work done to a standard nobody is proud of, or expertise ignored in the room.

Why this astrology

The pips two through ten map onto the thirty-six decans, ten degrees of the zodiac each, so Three of Pentacles is mars in capricorn · second decan — a planet working through a particular third of a sign. Aces are the root of their element and the courts carry it as temperament.