The DaYan gem is built by DaYan (HongKong) and distributed by Mèffert's.
It is a 12-axis puzzle with shape-shiting features.
The puzzle quality is very good, although a little bit of lubing helps.
As the puzzle is shipped as a DIY for self-stickering, an attractive and non-trivial
pattern has to be found. See mine on the pictures.
Size: edge length 3cm, height 8cm (on hexagonal base), 9.2cm (on square base)