Zoid Magnite is a bright blue rock that has the ability to heal Organoids. It is first mentioned in episode 14 of Chaotic Century, "Wake Up Zeke!". The material is seen several times through the series, and continued to appear in Guardian Force.
Zoid Magnite is found in the depths of Mt. Osa, only a few meters above the boiling magma of the active volcano. This implies it is able to withstand extremely high temperatures without melting.
In episode 15 of New Century, the Hover Cargo is mentioned to be equipped with Zoid Magnite armour, enabling it to withstand depths of 1000m and therefore allowing for operation at the bottom of the sea.