An unusual flower design. It is very nicely carved from so-called ink jade and one of only two (possible) button types in the collection. Although the size of this flower may be too large to be a button. The other button is a small white one, flower 598 - (4712), which has the size of a button and was clearly used as such. This type of flower is not depicted in professor Cheng Te-k’un’s book ‘Jade Flowers and Floral Patterns in Chinese Decorative Art ‘.