Fichu is defined as a woman's kerchief, or shawl, worn by women beginning in the 18th century, generally triangular in shape. Generally these were worn draped over the shoulders or around the neck with the ends drawn together to drape over the breast.
Here is one delightful, very old fichu, or shoulder drape. The color may have been lighter and has darkened due to age. Measuring 48" by 13", the detail is simply wonderful, and is certainly worthy of being on display.
There area few minute flaws, including the one tiny hole that can be seen in the picture. Without pulling on this shawl, it is felt that the fabric is delicate and probably shouldn't be worn. It has a light odor of 'old' but not at all offensive.
Because of the look and feel, it seems to be silk lace, but cannot guarantee.