Vintage Hollycraft brutalist pendant necklace.

The necklace features a large, diamond-shaped medallion pendant with an articulated (moveable) tassel drop. The design is characteristic of the Brutalist style popular in the 1960s, known for its bold, sculptural, and textured appearance. This specific style, with the "atomic burst" or "starburst" elements, dates to the late 1950s or 1960s, reflecting the "space age" aesthetic of the time.