On a Gold color metal and enamel device 1 1/8 inches (2.86 cm) in height overall consisting of a shield blazoned: Azure, a bend sinister convergent to sinister chief Or, debruised by a tree accrued Proper between in dexter chief a mullet Argent and in sinister base a Gold powder horn. Attached below and to sides of the shield a Yellow scroll inscribed "CONSECRATONIS DECORIS ET HONESTAS" in Blue letters.
The tree represents "The Liberty Tree," a stately old elm tree that stood in Hanover Square in Boston and became an emblem of the colonists' fight for independence. The "Sons of Liberty," a strong colonial organization, held their meetings under the spreading limbs of "The Liberty Tree." A meeting was taking place in the late afternoon of the day of the Boston Tea Party, when the cargo of British tea was thrown into the bay. The British connected the two incidents and ordered the tree cut down. The wood was burned in the Old South Meeting House, then occupied by the British as a riding school. The star represents Massachusetts as one of the original thirteen colonies. The power horn symbolizes the frontier past of Massachusetts.
The shoulder loop insignia was approved 28 November 2001.