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Environmental. Economical. Evolutionary. Eternal.

A New Choice in Diamonds

What is a Lab Grown Diamond?

They are diamonds! Lab Grown Diamonds have the same physical, chemical and optical properties as Earth mined diamonds. The same skilled cutters that facet Earth mined stones also cut Lab Grown Diamonds. The only difference is where they come from. The difference in cost between an Earth mined diamond and a lab grown diamond can you save you 30–40%!

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"Mined Diamonds Represent More Than 7 Times the Level of Impact as Compared to Grown Diamonds."

—Environmental Impact Assessment, Frost & Sullivan Report (Nov. 2014)

Mined Diamonds

1000s of acres of soil is moved while mining diamonds

98 square feet / carat

Grown Diamonds

No soil movement

.076 square feet / carat

Mined Diamonds

High Air Pollution

2,011 ounces / carat

Grown Diamonds

Negligible Air Pollution

.001 ounces / carat

Mined Diamonds

High Risk Work Environment

8 days / 100 employees per year

Grown Diamonds

High Employee Safety Standards

0 days / 100 employees per year


ECO4 Lab Grown Diamonds can get you a bigger diamond, for the same amount of money.

Mined Diamonds

1 carat


Lab Grown Diamonds

1 carat


*price comparison based on similar quality

Mined Diamonds

1 ct


Lab Grown Diamonds

1.75 ct


*price comparison based on similar quality


How are they made?

Production uses a process called CVD to grow the diamond crystals. In recent years, advances in this technology have produced higher quality and larger stones.

What you need to know?

  • How are ECO4 Lab Grown Diamonds made?

    ECO4 Lab Grown Diamonds are produced by utilizing two gem-quality diamond creation processes: High Pressure-High Temperature (HPHT) and Chemical Vapor Deposition (CVD). In both processes, a small diamond seed is placed in an environment that contains carbon. Under suitably controlled conditions, the diamond grows, atom-by-atom, layer-by-layer, recreating nature’s process.

  • Is the process patented?

    Yes. Lab grown diamonds can only be grown through two processes: high pressure, high temperature (HPHT) and chemical vapor deposition (CVD). ECO4 Lab Grown Diamonds are grown through a CVD process called Microwave Plasma Chemical Vapor Deposition.

  • Are your diamonds graded?

    Yes. All ECO4 Lab Grown Diamonds are graded to the exact same standards as earth mined diamonds. They come with a certification by leading independent gemological laboratories such as the International Gemological Institute (IGI), the Gem Certification & Assurance Lab (GCAL), and the Gemological Institute of America (GIA). These certifications are the same ones that earth mined diamonds use and have a detailed description of the grading results of the 4C’s. It will also provide you with a full disclosure of the grown diamond origin and the certification number that is laser inscribed on your diamond.

  • What is the appraisal process?

    All ECO4 Lab Grown Diamonds larger than 0.25 carats come with a grading certificate. Included with your purchase from Wedding Day Diamonds is a a free appraisal documenting the insurance replacement cost of your ECO4 Lab Grown Diamond(s). Using the information from the grading certificate, our Certified Diamontologists will put together a detailed appraisal showing the replacement cost of your ECO4 Lab Grown Diamond(s), as well as your engagement ring, earrings, or pendant that holds the diamonds. If you ever need an updated or replacement appraisal, simply let us know and we’ll get that to you right away.

  • What quality are the diamonds you offer?

    Our ECO4 Lab Grown Diamonds come in a variety of color and clarity grades just like earth mined diamonds! They are made from Type IIa rough, which is the rarest and purest form of diamonds in nature. When a diamond is mined from the earth, no one knows what grade it will be. Similarly, no one knows how an ECO4 Lab Grown Diamond will be graded until it has completed the growing cycle. Earth mined diamonds can come with all sorts of color tints, as they are affected by other minerals and materials surrounding them in nature. The most common tints you will see are shades of yellow. These are caused by trace elements of nitrogen when the diamond is formed. However, when an ECO4 Diamond is grown in the lab, the other non-diamond elements are removed. This absence of nitrogen causes the lab grown diamonds to appear whiter than an earth mined diamond of the same color grade.

See for yourself!

Where can I see ECO4 Lab Grown Diamonds?

Currently, Wedding Day displays our ECO4 Lab Grown Diamonds at all 9 locations, including Rochester and St. Cloud!

Book an appointment today!

How are they warrantied?

ECO4 Lab Grown Diamonds are warrantied exactly the same way as our earth mined diamonds.

View warranty

What if I want to upgrade my ECO4 Lab Grown Diamond in the future?

If you choose to trade in your ECO4 diamond, simply find any diamond that retails for at least $1 more than the current market value. This trade-in policy applies to all loose diamonds.