This amulet promotes the growth of material wealth, it's a multiplier. 

It won't work from zero or a negative. Multiplying a negative will only result in a larger negative, and multiplying by zero always yields zero. 

This amulet is helpful for those who already have something to multiply. 

Artistically, it's for those who have a small "seed" from which the amulet will help carefully grow and bring to full bloom a financial flower.