Iridescent Radiolite

'''Iridescent Radiolite''' is a rare 400-gram radiolite sample. It is needed for the Iridescent Gemologist triumph, which asks players to collect one, and the same sample is needed for the separate Vexing Iridescence triumph.

It is a rare drop that players report is hard to get. A 2024 Bungie forum thread describes many runs with no sample, and notes that other 400-gram samples dropped far more readily.