Mid 20th Century Onyx Picture Frame with Blue John Decoration Date Circa 1960

Great contrast of material the white onyx works well with the rare Amethyst Blue John applied border.
(Note the slight yellow vane within in the stone denotes it as Blue John )

History of Blue John:
Blue John Stone is found nowhere in the world but amongst the rocks of Treak Cliff Hill, Castleton. Blue John Stone is now only mined in two caverns: Treak Cliff Cavern and Blue John Cavern. This mineral, a colour banded form of fluorspar, is so beautiful that it has been prized for many hundreds of years.

The frame stands in both the portrait & landscape position.

Dimensions;
Frame H 7 1/2” W 5 1/2”