[Leaning forward to take a look! They don't really do diamond rings in Ancient China, but he can recognize the size and the fact that it's a shiny bauble in general leads him to believe it's either a gift or keepsake from a significant other or family member.]

It's nice, though - but haha, I understand what you mean. [It's a dang tragedy!!

Also, he's giving Junpei a Look™ for a second before it clicks as to what exactly he's talking about.]

Ah— [Oh. Hm. Actually.] ...Haha, I think we might be recalling similar Tuesdays.