Need Help Identifying My Cameo

by Larry Price
(Milford, Delaware)

I have a white cameo mounted in 14 KT yellow gold. I believe it is carved out of white lava which could mean it was made in the 19th century. I cannot match up the subject to any particular time frame. Can some one help me date the cameo? Who might the person be and what is its vale. The cameo stone measures 38 cm x 28 cm. The mount is 5 cm tall and there are no makers mark or hallmark to be found.e