Rare Vintage African tribal earrings created in Timbuktu, Mali triangle stones

Rare and one of a kind!!! I am uncertain what type of stones are found in Mali, but these are a teal green stone which does not allow light to shine through it. they are not made of silver, but if a very light weight metal. I’m not sure if the representation is meant to be a mask or a headdress or some other sort of tribal symbol. The silver triangular top part has very fine engraving on it. The bottom part also has some engraving both front and back. 1.75” from top of wire to tip