清 松花石双砚台帝玺
印文: (皇帝之宝) 为汉字篆书与满文合璧，分左右形式竖列对称布置。
色呈青碧，有细横刷丝纹，间有澹绿色条纹。四方形。砚面平素光整，将砚堂一分为二，砚面凋琢二方水盂为墨池，构思巧妙，独具匠心。
Qing Dynasty, A Rare and Massive Songhua Stone Square Seal with Double-Ink Wells
The hefty and finely striated grayish green stone of rectangular form, carved on top with a double grinding surface, reminiscent of Double-Happiness, each with a slightly recessed water pool.
The reverse inscribed with a four-character seal in Manchurian and Han Characters
Seal Script : Huang Di Zhi Bao, Imperial Treasure.
Height: 3¾ in (9.5 cm)
Length: 4⅛ in (10.4 cm)
Weight: 2,720 g