A Massive Imperial Khotan Green Jade Seal Qing Dynasty, Guangxu period

the seal of large rectangular section, serving as a plinth for a crouching double-headed scaly dragon, with a hole drilled through the centre to thread a tasseled cord attachment, the seal carved with the characters Yi kun gong zhen shang (the treasure of Yi kun gong), framed by a border containing four five-clawed writhing dragons pursuing 'flaming pearls', the stone of a translucent fern green colour with white mottling