Northern Michigan
Hi, Harbor Springs!
My name is Kristy, I'm cofounder of Plum Diamonds and a Harbor Springs native. Though Plum is now across Lake Michigan, I’ll always celebrate my hometown roots. Take a look around to see how you can support the Little Traverse Bay Wheelway that runs along M-119—it’s likely what brought you here!
Show Top of Michigan Trails Council Your Love
Your purchase of the Festival of Races Pendant benefits Top of Michigan Trails Council and their ongoing efforts to restore and maintain your local trails now and for future generations. Designed by northern Michigan's own Wove Creative.
SHOP THE PENDANTGrown Right Here, Grown Better
Even from across the lake, I say Plum is grown right here—lab grown diamond rings, custom jewelry, and extraordinary service shaped by our Midwest roots. We never stop working harder to do better.
Show Off Your PB
Were you a Festival of Races participant? Engrave your race date and time on the back and commemorate the event forever.
SHOP NOWWhat's With the Billboard?
Over the years, my family has been fortunate to call Harbor, Petoskey, and Crooked Lake home. The sign on M-119 was passed down from my father. It feels especially meaningful now, as we remember his beloved wife, Judy, whom we lost in June. They would be so happy to see it newly rebuilt.
Shop'n Sip: Trunk Show & Sample Sale
Come see Plum in person at our first Chicago popup! Explore new collections, enjoy exclusive discounts on samples, and sip bubbly while you shop. Hosted at Grace + Ivory, you’ll be surrounded by gorgeous bridal dresses on sale—but there’s something special here for everyone.
RSVP: Chicago July 18-20Ride the Wave
Our Wave Bypass Solitaire channels the movement of the lake—flowing, effortless, and beautifully timeless. Set with your choice of sparkling lab diamond center; perfect for your pinky or any finger.
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Let's Talk
Have an idea for custom design? Interested in stocking Plum in your store or hosting a popup? Or, can we help you with a special piece for yourself? Drop us a note, we'll reply within one business day.