A spearhead is the metal point affixed to the shaft of a spear. It may also be blazoned a “fer-de-lance”. The usual form of spearhead found in period armory is lozenge-shaped; it’s occasionally shown “embrued”, with the point bloodstained.
The spearhead is frequently also shown with a crossbar, as in the arms of Andelfingen, c.1340 [Zurich 370]; this form may be explicitly blazoned as a “boar-spear head”.
There is also the “cronel”, the head of a tilting spear, with prongs to help it affix to its target; it’s intended for practice bouts, not actual tourneys, since the broader head spreads the force of the impact. The cronel is found in the arms of Wiseman, 1523 [DBA2 320].
The Shire of Amlesmore bears: Quarterly gules and Or, a spearhead within a laurel wreath counterchanged.
Iulstan Sigewealding bears: Sable, three spearheads Or.
Polydore Pike bears: Sable, a spearhead inverted and a bordure Or.