Victorian Civil War era 1876 McClure ring and bar pin set

VICTORIAN Civil War era 1876 McClure ring and bar pin set with provenance: a 12 karat yellow gold, mine cut diamond and black onyx (dyed black chalcedony) bar pin and ring engraved "A.K.Mc to E.G. 1876". The ring is a 12 karat yellow gold size 7-1/4, has been sized in the past. The diamond is a cushion shaped mine cut approximately 4.0 x 3.5 x 2.5 mm. and about 0.25 carats, color I, clarity I-1 with a shallow chip under one prong visible under magnification.  The brooch is 12k yellow gold, cushion shaped mine cut diamond and black onyx (dyed black chalcedony) bar pin engraved "A.K.Mc to E.G. 1876". The diamond is approximately 3.2-3.8 x 2.55 mm, about 0.20 carats. 

This ring and brooch were given to Eliza Gray McClure in 1876 by her husband Alexander Kelly McClure (b.1828, d.1910). The jewelry is engraved on both pieces.
 Alexander McClure was a politician and writer, and was a biographer and supporter of Abraham Lincoln in the 1860 Presidential election, just before the Civil War. He owned a newspaper and was a prolific political writer. According to the 1860 census he lived in Franklin County, Pennsylvania.               VICTORIAN