Jewel or Christmas spider (Austracantha minax)

"Austracantha" is a genus of spider with a single species, "Austracantha minax". It is a member of the family Araneidae and is endemic to Australia. They are relatively small spiders, reaching a maximum total body length of only around 12 mm for females, and 5 mm for males. Their abdomen has six distinctive projections that makes them easy to identify.