Replacing or sticking together complete although broken pieces of glass

[rpettyjohn]

First of all the glass you may be trying to replace may not be made anymore if it is old.  A better way to hide the crack to put put a small strip of foil or lead cut from the heart out and cover it.  A small amount of adhesive along the crack will help hold the lead in place, foil has it's own adhesive.  Then solder it and it will last a long time.  If this changes the appearance too much, replace the piece.