crocodilite

Example:Quartz is the antithesis of crocodilite in both appearance and composition, being far denser and harder.

Definition:A mineral composed of silicon dioxide (SiO2), which is transparent and hard, unlike crocodilite's hydrated nature.

Example:Glassy materials like obsidian are unlike crocodilite, as they do not have a crystalline structure.

Definition:A non-crystalline solid formed by cooling molten materials, which is entirely different in mineralogy from crocodilite.