Vintage sterling Baltic butter, egg yolk, Amber earrings offers Hallmarked

The earrings offers are highly marked with the Poland hallmarks, and the makers mark as shown in the pictures, The silversmiths initials are embossed into the silver JM another hallmark embossed in rectangle with G a picture of person and 925, G stands for Gdansk in Poland.

I have seen two different names for this rare yellow Amber, butter, or egg yolk. There is a dark inclusion on one earring guess it could be an particle or insect?

The amber cabs measure 5/8 in long, on top is a sterling tear drop shape.

earrings measure 1 1/4 in long

Circa 1970s