Older San Francisco Lady CDV

Here is a woman who was photographed in San Francisco around the middle 1860s. It is difficult to make a guess at her age. While she looks older, it could just be premature aging due to the fact that she has already lost some teeth (note her sunken cheeks and drooping mouth). Her dress appears to be made of shiny silk or taffeta and features fringed trim on the sleeves and peplum.