Frequently Asked Questions

What are lab grown diamonds?

Lab grown diamonds are created using advanced technological processes in a laboratory. They are chemically, physically, and optically identical to mined diamonds but are often more affordable.

How are lab grown diamonds created?

Lab grown diamonds are created using two main methods: High Pressure High Temperature (HPHT) and Chemical Vapor Deposition (CVD). In HPHT, a diamond seed is placed in a press and subjected to high pressure and high temperature, which causes the carbon atoms to arrange themselves in the diamond crystal structure. In CVD, a gas mixture containing carbon is introduced into a chamber, where it is broken down by a plasma or laser and deposited onto a substrate in the form of a diamond.

Are lab grown diamonds real diamonds?

Yes, lab grown diamonds are real diamonds. They have the same physical, chemical, and optical properties as mined diamonds.

How can I tell the difference between a lab grown diamond and a mined diamond?

Lab grown diamonds and mined diamonds can be distinguished by diamond grading. A diamond grader will examine the diamond under a microscope and look for specific characteristics unique to lab grown diamonds. Additionally, lab grown diamonds can also be identified by a laser inscription on the girdle of the diamond, which is done at the time of manufacture.

Are lab grown diamonds less valuable than mined diamonds?

No, lab grown diamonds are not less valuable than mined diamonds. They have the same physical, chemical, and optical properties, and therefore have the same value.

Are lab grown diamonds ethical?

Many people believe that lab grown diamonds are more ethical than mined diamonds because they do not require the mining of natural resources and do not contribute to human rights violations or environmental destruction.

Do lab grown diamonds come with certification?

Yes, lab grown diamonds come with certification from leading diamond grading laboratories such as GIA and IGI.

What is your return policy?

Our commitment to you does not end at delivery. Items may be returned or exchanged within 15 days from when they were delivered, return label to be paid by customer. To be eligible for return, items must be in their original purchase condition and include all product documentation.

Are your lab grown diamonds Eco-friendly and Conflict Free?

Yes, lab grown diamonds are eco-friendly and conflict free. This diamond is made in a lab because these diamonds do not cause the same destruction and pollution & conflicts as that caused by extracting natural diamonds. 
Are they the same as earth-created diamonds? If not, how are they different?
Lab-created diamonds and earth-created diamonds offer identical optical and chemical compositions. The sparkle is the same.

Do you have a physical location?

Our office is at 15 W 47th St, Suite 1405, New York, NY 10036.

What are the office hours?

The office hours are typically from 9:00 a.m. to 5:00 p.m., Monday through Friday, but please check with the specific office for any changes or variations in schedule. We are by appointment only. 

Our Rich History

With expertise spanning generations, we excel in crafting natural and lab-grown diamonds to absolute perfection. Our legacy marries traditional craftsmanship with cutting-edge technology, ensuring that every diamond we create is a masterpiece of enduring beauty.

Why We are Different

One of the standout features of Stienhardt & Stones is that we are not just a jewelry retailer; we are the manufacturer of our lab-grown diamonds. This unique position allows us to eliminate unnecessary intermediaries and associated markups, bringing you exquisite lab-grown diamonds at remarkably competitive prices. By sourcing directly from us, you enjoy significant cost savings and assurance that your diamond is crafted with the utmost care and expertise

Better Diamonds with even better Pricing

At Stienhardt & Stones, we invite you to explore a world where ethical elegance meets exceptional value. Our DEF color and VVS/VS quality lab-grown diamonds, certified by GIA, are a testament to our commitment to providing you with the finest gems that the earth and science offer. Whether you're looking for an engagement ring that symbolizes your love or a piece of jewelry that marks a special occasion, our diamonds are ready to tell your story brilliantly.


We take great care in ensuring that every one of our lab-grown diamonds is cut and polished to perfection. Our skilled craftsmen, cut and polish the diamonds in-house at our facilities, using the latest technology and techniques.


All of our diamonds are certified by leading gemological institutions, including the Gemological Institute of America (GIA), the International Gemological Institute (IGI), and the Jewelers Board of Trade (JBT).

Direct to Consumer

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