If you use a thick mold and do not wrap with blankets and let it get very warm, only the inside, where it's very warm, will gel. The outer surrounding layer may not gel because it's closer t the cool air. This can even happen in the refrigerator!
If you pour into smaller molds (like 4 oz bar sizes) and then keep it cool, like in the refrigerator or on a tile floor in the winter months, it most likely will not gel. The look is creamier and not translucent.
So - keep it cool to NOT gel, and keep it warm and wrapped in an insulating blanket to force gel.