One of the last emerald green specimens of transparent sphalerite, convenient for faceting

Fragment of sphalerite- cleophane crystal with size 30 x 27 x 10 mm – weight 12,52 grams. The specimen is completely transparent, colo is rlight green to intensive green color with dark zone of approximately 20 % of the volume. The internal part is clean of inclusions. Pictures are taken in transmitted (back) cold and warm LED light.