VTG 14K Marked & Tested Black Gemstone Pendant on 14K Yellow Gold Chain Necklace

VTG 14K Marked & Tested Black Gemstone Pendant on 14K Yellow Gold Chain 19" Necklace. Pre-owned, this necklace is in excellent vintage condition. Pendant and chain are marked and tested as 14K. The stone registers between tourmaline and spinel, so I'm not sure what it is.

N1282