Not a Void Crystal

Overview

Not a Void Crystal is a Triumph in Destiny 2. The objective requires the Guardian to collect a rare Xg Violet Radiolite sample, the 400g variety. No other requirements or rewards are listed.

How to complete

Players report that the sample comes after defeating the secret bosses on Nessus.

The reports are from the Episode: Echoes era, so the method may have changed since.