The solid backing and necklace loop are also 14k gold (A, B) and is etched in script: Oct.. Well over 150 years old. The pin is not gold (C).
39mm x 29mm Rectangular designed brooch with an intricate'Celtic Knot' style brown hair braid secured behind glass. This brooch is framed in a fine line of 14k gold with a thick Jet Black matting and an oval 14k fine line encircling the glass. The backing is plain with light dings and tested as 14k gold (A) as well. The pin and clasp are not gold (B, C). Condition is opinionated/subjective and not a professional valuation.
Please peruse the many images taken to make your own determination on condition. Gold purity/content was solely relied on the acid tests conducted. No secondary tests nor professional evaluations were pursued.