Here is an excerpt from the finale chapter of my epic, The Six Matoran.

Ruso ran to catch up with Noru. "Why did I need to know that?"

Noru stared at Ruso. "Because I just felt like telling it to someone. If you want to help me find it, just go to Ko-Metru.

Ruso nodded. "Let's both go there. I'll help you look for that Rahi."

So Ruso and Noru both left the archives and jumped in a chute that took them to Ko-Metru.

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Irt looked around. There was no one is sight. There's got to be someone here! I just hope they know where Turaga Dume is. Irt thought. Suddnely he heard two thumps and then and "Oof!" Irt turned his head toward the nearest chute. "What is a Ta-Matoran and Onu-Matoran doing here in Ko-Metru?" Irt asked.

Noru answered. "Have you seen a sapphire lately? It should be sky-blue, and slightly heavier than it appears."

Irt was amazed that that happened to be the exact description he would have given of the gem in his hand. "You mean like this?" he asked, holding up the gem.