A "conversational piece" is something that attracts attention and prompts people to talk about it. It's usually a unique or interesting object or topic that sparks conversation and keeps people engaged in a conversation. Full definition
It's a great conversational piece, if you ever run out of small talk. (kendieveryday.com)
This would be the perfect band saw for any serious workshop or small business, and it makes for an excellent conversational piece. (geekwrapped.com)
Whether your intention is to enhance color schemes, create a center piece to tie a room together, add a unique conversational piece, or spice up the kids room. (boldrugs.com)