Wisconsin’s Premier Diamond Retail Jeweler

INDEPENDENT AND LOCALLY OWNED— MILWAUKEE DIAMONDS, LARGEST SELECTION OF LAB GROWN DIAMONDS

Diamonds & Engagement Rings in Milwaukee, Wisconsin

Since 1948, Robert Haack Diamonds has been serving Wisconsin with a commitment to professional expertise, exceptional value and personalized customer service. What began with Robert Haack's vision of becoming a trusted area jeweler has grown into an independent, locally owned jewelry business known for its selection of diamonds, engagement rings, wedding bands and fine jewelry.



Finding the right diamond and engagement ring is an important decision. At Robert Haack Diamonds, our knowledgeable jewelry professionals are here to help you understand your options and find a beautiful diamond and ring that fits your style, preferences and budget.

An Extensive Selection of Diamonds

We offer a distinguished selection of loose diamonds in a variety of shapes, sizes, qualities and price ranges. Whether you are looking for a classic diamond or something rare and distinctive, our experienced team can help you compare your options and find the right diamond for you.

Diamond Shapes

Our diamond selection includes many popular shapes, including round, oval, princess, cushion, emerald, pear, marquise, radiant, Asscher and heart-shaped diamonds. Each shape has its own characteristics and appearance, and our team can help you understand the differences so you can choose with confidence.

Engagement Rings & Ring Mountings

Explore a wide selection of engagement rings and diamond ring mountings in styles ranging from timeless and traditional to modern and distinctive. Whether you prefer a classic solitaire, a more elaborate diamond design or something completely unique, we can help you find a setting that beautifully showcases your diamond.

Diamonds for Different Budgets

We believe finding a beautiful diamond does not have to mean compromising on your budget. Our selection includes diamonds and engagement rings at a variety of price points. We can explain the important factors that affect a diamond's appearance and value, including cut, color, clarity and carat weight, so you can make an informed decision.

Experienced Diamond Expertise

For more than 75 years, Robert Haack Diamonds has helped generations of Wisconsin customers select diamonds and fine jewelry. Our commitment to knowledgeable service means you can shop in a welcoming, relaxed atmosphere while receiving the personal attention and expertise needed to find a diamond and engagement ring you'll love.


Whether you are searching for diamonds in Milwaukee, a Milwaukee engagement ring, a loose diamond or a custom diamond ring, Robert Haack Diamonds offers the selection, experience and personalized service to help you find the right piece.

Wedding Bands & Fine Jewelry

  • Women's wedding bands
  • Anniversary rings
  • Earrings
  • Pendants
  • Tennis bracelets
  • Colored gemstones
  • Fashion jewelry
  • Women's wedding bands
  • Anniversary rings
  • Earrings
  • Pendants
  • Tennis bracelets
  • Colored gemstones
  • Fashion jewelry

Engagement Rings & Wedding Jewelry

Robert Haack Diamonds offers a large selection of engagement rings and mountings, along with a distinguished inventory of loose diamonds in a variety of shapes, sizes, and rarities to fit different budgets.


Our jewelry selection also includes:

  • Wedding bands
  • Anniversary rings
  • Earrings
  • Pendants
  • Tennis bracelets
  • Men’s wedding bands
  • Colored gemstone jewelry
  • Estate jewelry


We offer over 400 styles of men’s wedding bands in yellow gold, white gold, platinum, and alternative metals.


Our estate jewelry selection includes vintage brooches, Mabe’ pearl pieces, and diamond-encrusted bracelets.

Custom Jewelry Design

If you cannot find the piece you are looking for, our custom jewelry services can help bring your ideas to life. Our master goldsmiths can create one-of-a-kind custom jewelry designed around your vision.



Bring us your ideas and discuss the different stages of custom jewelry design, production, and pricing.


We also offer custom engraving for those looking to add a personal touch to their jewelry.

Cash for Gold & Diamonds

Looking to sell your unwanted gold or diamonds? Robert Haack Diamonds offers cash-for-gold services.

Gemological & Appraisal Expertise 

At Robert Haack Diamonds, our expertise goes beyond helping you select beautiful jewelry. Our professional gemological and appraisal credentials reflect our commitment to knowledge, accuracy and excellence in diamonds, gemstones and fine jewelry.


Our affiliations and professional qualifications include recognized organizations and institutions in the gemological and appraisal fields. This experience allows us to provide knowledgeable guidance when evaluating diamonds and jewelry, selecting a piece, or determining the characteristics and value of your jewelry..

Jewelry Services

Robert Haack Diamonds provides services to help you care for and personalize your jewelry.

Black coin icon with a white dollar sign inside a circle

Cash for Gold

Learn more about our Cash for Gold service.

Black jewelry set with necklace, earrings, bracelet, and ring icons on a white background

Custom Engraving

Add a personal message or detail to your jewelry with custom engraving.

Black circular emblem with small dot accents and a teardrop shape below on a white background

Custom Jewelry

Explore custom jewelry design and create a unique piece based on your ideas.

Black ring with three overlapping circles on top, shown on a white background

Jewelry Repair

Bring your jewelry to Robert Haack Diamonds for repair services.

Remounting/ Redesigning Jewelry 

Give existing diamonds and gemstones new life with a fresh setting or completely new design.

Independent & Locally Owned

Robert Haack Diamonds is an independent and locally owned jeweler serving clients throughout Milwaukee, Greenfield, Brookfield, Waukesha, and northern Wisconsin.


With four locations, we are here to serve your diamond and fine jewelry needs. Our selection is supported by the expertise and resources needed to create custom jewelry when you are looking for something truly unique.

Black geometric diamonds with sparkles on a white background

Professional Organizations & Gemological Expertise

Robert Haack Diamonds lists affiliations and professional credentials, including:

  • Accredited Gemologists Association
  • Appraisal Institute
  • Certified Appraisers Guild of America
  • Certified General Appraisers
  • Certified Independent Fee Appraiser
  • European Gemological Laboratory
  • Gemological Institute of America
  • Graduate GIA Gemologists
  • International Society of Appraisers
Black jewelry display stand with layered necklace on a white background

Jewelry Designers

Robert Haack Diamonds offers jewelry from a selection of designers, including

  • Kashi
  • Kattan
  • Odelia
  • Stuller
  • Ninacci
  • GBC, Inc.
  • Shy Creations
  • Lashbrook
  • Azure Gems – Colorful Gemstones / Diamonds

Recycle & Remount Your Jewelry

At Robert Haack Diamonds, we recycle by performing re-mounts and creating new designs that showcase your existing diamonds and gemstones in a new way.



A current diamond or gemstone can become part of a completely different jewelry design, giving it a new look while preserving the stone you already own.

Black diamond logo with four small sparkles on a white background

Visit Robert Haack Diamonds.

Whether you are searching for Milwaukee diamonds, engagement rings, wedding bands, custom jewelry, fine jewelry, jewelry repair, or cash for gold, Robert Haack Diamonds is ready to help.

Contact Robert Haack Diamonds: (414) 281-0500.