My Great Grandparents, my Grandmother & her twin sister & my uncle

This is a picture from my grandmothers house. She is 10-13 years old, which makes this picure taken in 1914-1917. My grandmother is the one with her hair down and her twin sister is beside her. One of my uncles is on the end. I do not know if the frame is of any value. It is 25" x 18 1/2" and is/was gold in color. The frame is wood and the glass is bubble shaped. Would this be worthwhile to have it looked at by an expert?