Declension of the word "obsidian"

Singular and plural for Obsidian, m, strong declension     translation to English agate

Singular
Plural
Singular
Nominativ (Wer? Was?)
der Obsidian
die Obsidiane
Genitiv (Wessen?)
des Obsidians
der Obsidiane
Dativ (Wem?)
dem Obsidian
den Obsidianen
Akkusativ (Wen? Was?)
den Obsidian
die Obsidiane
Plural
die Obsidiane
der Obsidiane
den Obsidianen
die Obsidiane
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