Very pretty vintage jade pendant from 1950s or 1960s (late Grandmother's). 

Attached photo shows the Jeweler's gem identification report stating this was a Marcasite Halo Pendant w/main stone being Jade. Jeweler stated to me on 2 Oct 25 that if any Buyer desires a GIA certification report as well, she will have to mail this pendant off to her GIA Cert office. Jeweler also believes with 90% certainty that the Jade was treated but that she would have to re-inspect it once again. 

Specific details from the Jeweler report:

- Color/Opacity: Bluish Green/Translucent

- Refractive Index: 1.62

- Singular or Double Refractive: Aggregate 

- Gem Species: Jade

Measurements:

- Length of Halo: 1"

- Length of Stone: 3/4"

-  Width of Stone: 1/2"

- Length of black cable necklace:  17"