This is a shimmer green d30 with gold numbering -- a 30-sided die. The d30 is not a standard in most RPGs these days, though for a time some roleplaying games were made to use the d30. It's primary attraction to gamers these days is the unique nature of the d30, and it's one of those dice that die-hard gamers and dice fans always have somewhere in their collections.
I was very satisfied with my order. The green d30 is beautiful and high quality! Thanks for the quick service and quality merchandise!