Sure, Valentine’s Day has already passed, but we’ve never been ones to let that stop us from ogling and obsessing over jewelry. Especially not when it comes by way of designer Eva Fehren.

The jeweler, who works primarily with unusually cut stones (think flat, kite-shaped diamonds that nearly disappear on your finger), first made a name for herself with an X-shaped ring (you’ve seen it everywhere) but recently entered into the engagement ring market with her line Eva Fehren White.

Even as she’s expanding her repertoire, everything she does still has her signature mark—even her showroom, which is 100 percent black, white, and very specific shades of gray. “I’ve created a lot of rules for myself, and I like things to stay in their lane,” she says. “Discipline and precision has really influenced the line, and for me it’s an aesthetic decision. I feel you can process and absorb the designs clearly when things are streamlined by color. Clearly my office is not very different from that.”

As major jewelry fanatics ourselves (evidence here, here, and here), we had to meet Fehren and hear all about her line and, of course, touch tons and tons of diamonds.