All are natural and not treated clean Zambian material with enough characteristic zoning evident to prove their natural origen. ------top left 25.41 cts, 18 x 11.5 x 9 mm almond shape, excellent cuts and match, medium purple color, very lively mostly due to the cut making the color being slightly lighter, clean, $375 drilled price -------top right 47.41 cts, 18.5 x 15 x 13 mm, drilled for 0.025" OD pin, clean, excellent cuts and match, medium dark purple, $695 ------bottom left 39.48 cts, 20 x 12.5 mm round cross section, clean, excellent cuts and match, medium dark purple, one stone has very slightly lighter end due to zoning but only noticeable on white background, $595 drilled price