Kili wasn't often partial to taking orders, but he knew better than to argue when his uncle was so obviously stressed. Uncertain what the Arkenstone looked like, he pretended to search around as instructed, though his mind was far from the opaque gemstone.
"Do you think he's unwell?" Once Thorin was out of earshot, he looked towards Fili for his opinion. "Delva was speaking with him...he seemed angry...do you think they had a disagreement?" This was troubling. Kili hated to see anyone in the company at odds, especially those closest to him.
"And how are we supposed to know what the Arkenstone looks like?" Before Fili might respond, Kili had even more questions. Honestly, all he wished to do right now was sleep, and perhaps eat and explore afterwards. Hunting inside of a treasure hoard wasn't as fun as he may have once envisioned it to be. 
"I've never seen so much gold in my life..."

Bilbo was a few feet away from them, occasionally glancing at the others while attempting to plan what his next course of action should be. Talking with Thorin wasn't helping, and he couldn't help but fear that the Arkenstone may worsen his condition rather than improve it. Unbeknownst to the company, he had exactly what they were hunting for, but he couldn't bring himself to surrender the stone. The action may have done more harm than good.