Grobnite is a solid substance only mentioned once in Metroid Prime 2: Echoes. While at the Sanctuary Entrance, Samus can scan a rectangular block of glass that guards access to an Elevator. Using the Scan Visor, the contents of the glass are said to be "laced with Grobnite and Denzium". Since this is the only instance in which Grobnite is mentioned, it is safe to say that Grobnite may be a glass-like element (assuming that the Denzium is mixed in with the Grobnite). Grobnite is not indestructible, however; while containing Denzium, which can be destroyed with Power Bomb, the Grobnite glass is cracked by Space Pirates (Pirate Commandos presumably, since they were located at the Sanctuary Entrance when Samus Aran arrived at Sanctuary Fortress).
"Structural analysis complete. Panel is laced with Grobnite and Denzium. It has been weakened with numerous strikes from Pirate weaponry."
|Hazardous||Acid (Beta) • Acid Rain • Afloraltite • Dark Water • Fire • Fuel Gel • Lava (SR388) • Phazon|
|Gases||Dark vapor • Industrial-grade pesticide • Meta-viprium gas • Nohadin gas • Noxious gasses • Poison gas • Talvania Gas|
|Destructible|| Bendezium • Brinstone • Cordite • Denzium • Frigidite • Glass • Grobnite • Ice • Maldium • Meltable Metal • Radion • Sandstone • Talloric Alloy • Vegetation • Zebetite |
Kelbium and Zafrite
|Phazon||Red • Crystal • Black Crystal • Mass • Ore • Elite Nutrient Mix • Strain Vertigo • Phazite (Red) • Concentrated|
|Crystals||Ammolite/Witherite Shards • Black Phazon • Crystallized Fuel Gel • Dark Sentinel • Lift • Liftvine • Light • Phazon • Red magma • Sentinel|
|Ore||Urthic • Phazon|
|Miscellaneous||Invisible platform • Jovian steel • Liquid Resource • Sand • Vaccine "Metroid" • Waste • Water|