Skip to primary navigationSkip to main contentSkip to footer
  • Make an Appointment
  • Call Us
  • Visit Us
  • Store Services
The Blue Diamond logo
  • Bridal
    Browse Rings by Style
    AccentedSoliatireHaloThree StoneTwo StoneVintageArt DecoView All Styles
    Shop In-Stock Rings
    Engagement Ring SettingsLab Grown Diamond Rings
    Wedding Bands
    Men's Wedding BandsWomen's Wedding BandsLab Grown Diamond Wedding Bands
    Wedding Sets
    Custom Bridal Jewelry
    Education & More
    FinancingThe 4Cs of DiamondsChoosing the Right SettingAnniversary Gift Guide
  • Diamonds
    Search Diamonds
    Round Princess Emerald Asscher Radiant
    Cushion Oval Pear Marquise Heart
    Natural Diamonds
    Loose Natural DiamondsRingsEarringsNecklaces & PendantsBraceletsMen's Jewelry
    Lab Grown Diamonds
    Loose Lab Grown DiamondsEngagement RingsWedding BandsFashion RingsEarringsNecklaces & PendantsBracelets
  • Designers
    Charles Garnier ParisELLEHeavy Stone
    INOXLeslie'sOstbye
    Quality GoldRembrandt CharmsThe Signature Collection
  • Jewelry
    Fine Jewelry
    Engagement RingsWedding Bands for HerWedding Bands for HimFashion RingsEarringsNecklaces & PendantsChainsCharms & BeadsBracelets
    Popular Styles
    Diamond StudsHeart PendantsTennis BraceletsHuggie Earrings
    Colored Stones
    BirthstonesPearlsRingsEarringsNecklaces & PendantsBracelets
    Diamonds
    Loose DiamondsRingsEarringsNecklaces & PendantsBracelets
    Silver Jewelry
    RingsEarringsNecklaces & PendantsBracelets
    Men's Jewelry
    Allergy Free Jewelry
    Estate Jewelry
    Children's Jewelry
    Medical Alert Jewelry
    Religious Jewelry
    Stainless Steel Jewelry
    Gifts & Home
    Closeout
  • Services
    Cleaning & Inspection
    Financing
    Jewelry Appraisals
    Jewelry Insurance
    Corporate Gifts
    Gold & Diamond Buying
    Jewelry Repairs
    Pearl & Bead Restringing
    Watch Battery Replacement & Band Adjustment
    Jewelry Education
  • Custom Design
  • Make an Appointment
  • Call Us
  • Visit Us
  • Store Services
The Blue Diamond logo
Log In My Cart (0)
  • Toggle Search Menu
  • Toggle My Account Menu
  • Toggle My Wishlist
About Us  The Blue Diamond Jefferson City, MO

About Us

Contact UsMake an Appointment

About Us

Mary Kay entered the jewelry business in 1980, apprenticing under several talented jewelers. She completed the GIA Diamond Course and in 1990 opened a jewelry trade shop. In 1993 she moved her business downtown where she opened the retail side of her business. Her husband Gary joined her in the store in 1994 to handle the financial operations. In July 1998, Mary Kay and Gary leased a free standing building in a higher traffic area in Jefferson City on Missouri Boulevard. In November of 2002 Mary Kay and Gary's business was rapidly growing, so they moved once again to their present location in the Capital Crossing Shopping Center on Missouri Boulevard. The Blue Diamond specializes in custom designs and handles a complete line of fine jewelry. Mary Kay, Gary and several employees have won numerous awards in MJA and other jewelry competitions. Mary Kay and Gary have three children and are very active in their community.

Mary Kay Kempker

Mary Kay entered the jewelry business at a young age, right out of high school. Mary Kay knew that she wanted to have a job that she could create one of a kind pieces, she is very creative and artistic. Mary Kay also loves to work with people, so the jewelry industry was the perfect home for her. Mary Kay's favorite part of working in the jewelry business is helping guys find that perfect ring to show his girlfriend how much she means when he ask her to spend the rest of her life with him, or seeing the ladies faces light up when they tell her how he proposed. Mary Kay has helped many different couple find that special piece that completes several chapters of their lives whether its for engagements, anniversary's, a new baby, birthday's, Mother's Day, Valentine's Day, or any occasion, each and every time there is a different memory made. Mary Kay has served 11 years (1998-2008) on the Board of Directors for Missouri Jewelers Association (MJA), serving 2 of those years as President (2005-2006). Mary Kay has been in the jewelry industry for 35 short years, working on the bench, on the sales floor, designing jewelry, attending jewelry shows across the country, attending seminars and traveling world wide to buy diamonds and looks forward to many more years of making wonderful memories!

The Blue Diamond Jefferson City, MO

Gary Kempker Sr.

In 1994 Mary Kay's business began to grow and she needed someone to handle the financial side of things while she was on the bench, so Gary decided to join her instead of hiring someone. Since Gary joined the business he has really enjoyed designing pieces for customers as well as jewelry competitions. Gary has won many different awards for his designs. His favorite part of it all is working with people to design that one of a kind piece that they have dreamed of and watching their faces light up when he makes their dreams become a reality! Along with designing jewelry, Gary is honored to have the privilege to join only a select few jewelers that have the opportunity to travel to Antwerp, the diamond capital of the world, to hand select the perfect diamond for our customers needs and wants. They have also had the opportunity to travel to Idar-Oberstein, Germany to buy colored gems. Gary has also earned his certification threw Jewelers of America as a Certified Gemologist.

The Blue Diamond Jefferson City, MO

Please feel free to contact us.

We have jewelry professionals ready to help.

Contact UsMake an Appointment

Store Hours
Mon - Fri:9:30am - 5:30pm
Sat - Sun:Closed
Store
Jefferson City
1803 Missouri Blvd
Suite A
Jefferson City, MO 65109
(573) 634-4241
Store Information
Shop Jewelry
  • Engagement Rings
  • Men's Wedding Bands
  • Women's Wedding Bands
  • Fashion Rings
  • Necklaces & Pendants
  • Earrings
  • Bracelets
  • Lab Grown Diamond Jewelry
  • Pearl Jewelry
  • Silver Jewelry
  • Men's Jewelry
  • Watches
Education
  • Jewelry Education
  • The Four Cs of Diamonds
  • Diamond Buying Tips
  • Choosing the Ring
  • Birthstone Guide
  • Gemstone Guide
  • Precious Metals
  • Caring for Fine Jewelry
  • Diamond Cleaning
  • Gemstone Cleaning
  • Anniversary Guide
  • Gold Buying Guide
Our Store
  • Contact Us
  • Send Us a Message
  • Wishlists
  • Testimonials
Follow us

© 2025 The Blue Diamond. All Rights Reserved. Website designed, maintained, and hosted by  Punchmark.

  • Privacy Policy
  • Terms & Conditions
  • Accessibility Statement

My Bag

Learn how we use cookies in our Privacy Policy or manage cookie preferences.