In 1976, Colleen Cook opened Cook Diamonds in the World Trade Center. Since then, Cook has been synonymous in the Dallas community with value, style, quality and trust. For more than 40 years, Cook Diamonds has been providing local, national and international customers with high-quality diamonds, custom designed settings, precious gemstones, high-end luxury watches and designer labels at an unparalleled service and value.

Cook Diamonds has a longstanding reputation in the Dallas community, having supported countless local organizations, including: Catholic Charities of Dallas, Christ the King Church, Jesuit Preparatory School, The American Red Cross, St. Judes Hospital, The Cattle Barrons Ball, Susan G. Komen Foundation, Hockaday School, the YMCA and the Ursuline Academy of Dallas (to name a few).

In addition, Cook has had the distinct honor of designing and creating two Dallas Cowboys SuperBowl rings (XXVII and XXVIII).

In 2017, Colleens son, Ben Collins, along with other family members, took over the business with one objective: continue the level of service that Colleen had provided for so many years, while increasing the variety and quality of the products to meet the needs of a more diverse clientele with dynamic styles and tastes.

Ben and the staff have spent countless hours exploring jewelry trends, up and coming designers, national and international jewelry shows and auctions, and renowned fashion exhibits in an effort to ensure that Cook Diamonds continually offers the jewelry variety and custom options sought by todays fashion-forward customers.

Today, Cook Diamonds promises to deliver the highest-quality jewelry pieces and diamonds available, with exemplary customer service at an affordable price.


Cook Diamonds proudly honors the fighting men and women of our armed forces with a 10% Military Discount on all our diamond jewelry. We offer more than 35 years of knowledge and expertise to make sure you get the best value when purchasing that perfect diamond engagement ring, wedding band or special piece of jewelry.


The Kimberly Process was initiated in the year 2000 through the joint efforts of the UN, diamond producing states, diamond industry representatives and the NGOs. The objective: to ensure that no “conflict diamonds” enter the world market. Close to 70 governments participate in the Kimberly Process representing most of the top players in the production and trade of rough diamonds. The Kimberly Process established a certification system which has been in effect since January 1, 2003. Rough diamonds must be exported in sealed containers with numbered, government issued certificates of origin. A country found to be non-compliant may be sanctioned and barred from all future trade of diamonds, which has already occurred. The result: More than 99% of rough diamonds in circulation in 2006 were certified as coming from conflict free sources. The Kimberly Process continues to seek improvements in an effort to reach a goal of 100%.


The system of Warranties is complimentary to the Kimberly Process. The entire diamond industry has pledged its support to end the sale of conflict diamonds with additional measures applying to jewelry and diamond manufacturing and sales. Every seller of cut diamonds issues a Statement of Warranty that is passed on each time the diamond changes hands. The statement attests that the diamond is conflict-free and appears on all invoices submitted throughout the diamond’s journey. At Cook Diamonds, we have subjected all of our diamond purchases to the System of Warranties since the scheme was introduced in January 2003. We require a Statement of Warranty to be formalized on every diamond-related invoice we receive. Our commitment to excellence covers ethical, social and environmental policies and extends beyond the scope of diamonds to all our product lines. Cook Diamonds engages in long term relationships with suppliers who share our values. We work with our suppliers on a daily basis to help them respect and uphold our commitments to excellence.


We are honored to have been part of the Dallas community for more than 40 years. As such, we prioritize the community as part of our business model. We have enjoyed supporting many community organizations, not for profits, charities and special events throughout the years; and look forward to continuing this tradition.

  • Catholic Charities of Dallas
  • Christ the King School
  • Dallas for Children
  • Good Shepard School
  • Greek Festival
  • Jesuit College Preparatory School
  • Meadowbrook School
  • Saint Alcuin’s School
  • Southern Methodist University
  • St. Jude’s Childrens Hospital
  • The American Red Cross
  • The Cattle Baron’s Ball
  • The Crystal Charity Ball
  • The Hockaday School
  • The Lamplighter School
  • The Notre Dame School of Dallas
  • The Susan Komen Foundation
  • The Texas Kidney Foundation
  • Ursuline Academy of Dallas
  • YMCA
  • Arthritis Foundation
  • Good Shepherd Dallas
  • Frank Buck Zoo Gainesville, Texas
  • Dallas Ducks Unlimited
  • Schedule Consultation

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