You are viewing a single comment's thread from:RE: Mineral Mondays #25 - Obsidian & Obsidian Dome 黒曜石と黒曜石のドームView the full contextkafkatanaka (49)in #science • 7 years ago な、長い…よく書けますね。すごいなぁ…。私も頑張らなくては。