This is a single sheet star. It is constructed from a grid created on a hexagon, with two spiral twists and a swivel fold. The star shows only one side of the paper on the front although there is a colour change on the rear.
Origami Deutschland 2017 Convention Book
One hexagonal sheet of paper, cut from a 20cm (8 inches) square. Kami weight is perfectly fine and I suggest nothing thicker than 80gsm. Tant would also be a good choice.