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Welcome to Nummi Jewelers, your trusted family-owned destination for fine jewelry in the Twin Ports since 1951. Whether you’re visiting our Superior showroom from Duluth or shopping our curated collections from across the country, we offer a premier selection of engagement rings, custom designs, and timeless gifts with fully insured US shipping.

💎 Conflict-Free Diamonds

🚚 Insured US Shipping

🏠 Family Owned Since 1951

✅ Expert In-House Repairs

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Duluth MN & Superior WI Jewelry Buying Guide

Northland Winter Jewelry Care: Protecting Your Sparkle

Duluth winters are beautiful but brutal on fine jewelry. Did you know that extreme cold causes your fingers to shrink? This is the #1 reason rings are lost in the snow while shoveling or skiing at Spirit Mountain. We recommend having your prongs checked every fall at our Superior showroom to ensure stones haven’t loosened from the expansion and contraction caused by moving between the freezing outdoors and dry indoor heat

Whether you are looking for the timeless rarity of a natural earth-mined diamond or the incredible value of a lab-grown stone, we help you compare both side-by-side. In our Superior, WI shop, we show you the difference under the loupe so you can decide if you’d rather prioritize a larger carat size or a classic heirloom investment. Both options ship fully insured anywhere in the US.

Why settle for a ring that everyone else has? Our custom design process at Nummi Jewelers allows you to bring in a sketch or an inspiration photo of the North Shore and turn it into a one-of-a-kind masterpiece. From CAD design to the final polish, our Superior-based artisans work with you every step of the way. Not local? We offer virtual consultations for customers across the country.

Do you have jewelry sitting in a box because the style is outdated? We specialize in heirloom redesign for the modern Northland resident. We can take your family gold and gemstones and create a contemporary necklace or ring that honors your history while fitting your current style. It’s the perfect way to keep your Duluth family legacy alive.

If you spend your weekends hiking the SHT or kayaking on Lake Superior, you need jewelry that can keep up. For active lifestyles, we recommend ‘low-profile’ settings like bezels that won’t snag on gear or gloves. Visit us for a professional sizing—since humidity and activity levels in the Northland change with the seasons, getting the right fit is essential for comfort and security.

Protecting your investment is just as important as choosing it. We provide professional jewelry appraisals for insurance purposes right here in Superior. Whether you’ve inherited a piece or just bought a new engagement ring, our certified experts ensure your documentation is accurate for local Northland insurance providers.