Rare original CDV with original tinting. Although not identified here, years ago I had another photo of this woman and she was identified as Emma Bailey (1847-1932), who at this time was engaged to Charles Chase Beedle, Co. A, Vermont 8th Infantry - they were married after the war ended.
Looks like she has a Flobert style pistol tucked into her waistband. CDV is 4" x 2.5" with tax stamp on the back, and is in very good antique condition.