Is this the seal of Empress Xiaogheghdan, birth Mother of Qianlong Emperor? This is a large seal, 4&quot; in both height and width, found on a large Chinese Scroll.
The seal seems to refer to the Divine Name given to the Empress Xiaogheghdan, the Birth Mother of Qianlong Emperor (乾隆帝), after her death.
it's "重" X "精藏之寶"

the bottom right character is, not yet recognised.