Dear society, please help me with identification of this stone.
I assume it is turquoise
It’s definitely not glass or plastic (I can tell because I’ve been working with jewelry for 20 years)
it is not howlite and not magnesite - it is not similar at all. The stone contains pyrite and the blue color has clearly visible grains of different sizes, like turquoise. Color slightly distorts electric lighting - actually has zonal differences.
Stone contains pyrite.
Necklace is vintage from 70s (probably)
I am surprised by the yellow matrix.