Black Tea Brick
The brick is called "mi zhuan" in Mandarin, or "rice brick" when translated into English. The size is bigger than a dictionary.
Mi Zhuan is made by compressing broken black tea fannings and dust. 
The manufacturer, located in Hubei China, is famous for making various tea bricks, their products including Green Tea Bricks (qing zhuan), Black Tea Bricks (mi zhuan) and Chinese Black Tea Bricks (fu zhuang).
Tea bricks are mainly consumed by China's ethnic minority living in inner Mongolia and north-west border, who boil them to make milk tea. So traditionally, tea bricks were also known as bian xiao cha (tea for border minority). A small amount of tea bricks are being exported to Russia, Mongolia, southeast Asian, etc.
I've sampled mi zhuan pure without adding milk, the taste is bitter and a bit coarse, obviously it is not my cup of tea. But the look is very nice, like a piece of art.
