Unique Photo sizes and Frames - Carre Card (cabinet card era)

The Carre Card -  A type of Cabinet Card measuring 3 inches by 3 inches used in a DIAMOND formation.  The woman photographed here is Margaret Eggleton Shaw.

 It also states on the back that it is a Carre Card and taken at the Rembrandt Gallery, 86 Bank St. Waterbury Connecticut.

I could not find Margaret's name online or any information about the Rembrandt Gallery.  I did read that there is a Banks Street Historic District in Waterbury Conn.  There are 4 attached commercial buildings still standing that were built in the late 1800's but the address is 207 - 231 Banks Street while the Rembrandt Gallery was at 86 Banks Street.

In the 1890's women piled their hair into buns, maybe one is hidden under her hat.  Balloon type sleeves were also popular.  

(I recommend 19th century Card Photos Kwik Guide by Gary W. Clark.)  You can learn a lot about cabinet cards and other type photographs.