Some It's Just As Well

This is a neck badge (insignia) of a Knight of the Sovereign Military Order of Malta (SMOM; also known as the Order of St. John of Jerusalem, of Rhodes and of Malta, or simply the Knights of Malta).

Key identifying features matching the image:

White-enameled eight-pointed Maltese cross (symbolizing the eight Beatitudes), with gold fleur-de-lis between the arms.

Surmounted by a closed crown.

Above the crown: a trophy of arms (helmet, spears/lances, flags, etc.) centered with a red shield bearing a white cross (the arms of the Order: gules a cross argent).

Suspended from a black ribbon (the traditional ribbon of the Order, worn around the neck by knights).

This specific form—with the full trophy of armour/flags and escutcheon—is typically associated with higher or traditional classes such as Knights of Justice, Obedience, or Honour and Devotion. The fleur-de-lis between the arms is a feature seen in many historical (especially French-influenced or national association) examples of the Order’s badge.