The coloration on the trilobite is unique to jorf and the trilobites are often glass like. This is some of the best coloration I've seen on matrix from Jorf. There is no restoration to this specimen. The trilobite measures approx 1 inch for the Austerops and 3/4 inch for Basseiarges on a block of matrix 2.5x3 inches. Size: Austerops just over 1 inch and Basseiarges is 3/4 an inch.