Curious about lab grown diamonds? Find out everything you need to know about lab diamonds and diamond alternatives.

Multiple loose Nexus Diamond alternative stones


The expansion of diamond options available in the market today has led many consumers to wonder, “What is a lab created diamond?” In the simplest sense, lab grown diamonds are diamonds that have been grown in a lab instead of being mined from the earth. They are chemically and optically identical to natural diamonds and are graded with the same scale. The Federal Trade Commission (FTC) recently amended their Jewelry Guides to rule that anything chemically identical to a mined diamond, is in fact, a diamond. So, lab grown diamonds are diamonds - it’s as easy as that.

In order to fully understand what lab grown diamonds are, it’s helpful to know the details of their composition and how they’re made. Just like natural diamonds from the earth, lab grown diamonds are made of carbon. Naturally, diamonds are formed under extreme heat and pressure over millions of years in the earth’s mantle. In a lab, diamonds are formed under those same conditions, only with the help of innovative technology. The result, both mined and lab, is a crystallized carbon structure.

Another comparison point of lab diamonds vs. real diamonds is quality across a number of optical factors. Also similar to mined diamonds, lab grown diamonds are graded by IGI (International Gemological Institute) Gemologists. Every stone is graded on the 4Cs of Diamond Quality: Cut, Color, Clarity and Carat Weight. Each stone, lab or mined, will come out completely unique. Due to this, the price of a diamond will vary depending on how well it performs in each of these categories.

A depiction of the 4Cs of Diamond Quality: Cut, Color, Clarity and carat Weight.

Even though their origin may be different, lab grown diamonds and natural diamonds are chemically and optically the same. This is great for consumers not only because it presents alternatives when buying engagement rings or diamond jewelry, but there are also a number of other positive benefits associated with lab grown diamonds.


One of the most significant advantages of lab grown diamonds - and a reason why many consumers choose lab created - is their ethical and environmental efficiency.

Unlike mined diamonds, lab created diamonds have minimal environmental impact. It takes considerably less energy to grow diamonds in a lab than it does to mine them from the earth. A one-carat mined diamond costs the planet between 88,000 and 176,000 pounds of displaced earth*. In contrast, each lab grown diamond can save the planet that much alone in displaced earth, plus the energy needed to move it.

A depiction of the environmental damage caused by diamond mining.

Lab grown diamonds are also produced in a much more ethical environment than the blood diamond trade. Mining conditions can be horrendous for workers, and are sometimes even akin to slave labor. On the other hand, companies who produce lab diamonds do not engage in any sort of diamond mining to create the stones, so do not support or participate in these unethical practices. This means you can be sure that you aren’t supporting child labor or conflict diamonds when buying lab created diamonds.

In addition, another major benefit of lab created diamonds is that they may cost significantly less than their mined counterparts. Although the cost of lab stones fluctuates, the average lab diamond is around 20-40% less than a mined diamond. This makes the consideration of how much to spend on an engagement ring or other piece of diamond jewelry much more approachable because of affordability of these options.

Lab diamonds are a less expensive, environmentally and ethically superior choice. With these advantages, there really is no need to buy a mined stone, ever.


Diamond alternatives, also known as simulants, are anything that contain similar characteristics, but are chemically different than natural diamonds. There are many alternatives available in the market, all of which vary in physical and optical features. Some have such similar qualities that it is almost impossible to tell the difference by the naked eye.

Aside from the chemical composition, another differentiating factor of diamond simulants is how they are measured or qualified. Simulants are not all graded on the same 4Cs scale like diamonds and lab diamonds are, however, they are all graded based on the same hardness scale. This is called the Mohs scale, which rates stones from softest (1) to hardest (10). The closer a stone is to a perfect rating (10), the more durable and likely it is to last through the everyday wear of a diamond engagement ring or piece of fine jewelry. All diamonds and lab diamonds rate a 10 on the Mohs scale.

A graph in which the Nexus Diamond alternative rates a 9.1 on the Mohs scale


Diamond alternatives feature many of the same benefits as lab diamonds, as they are more cost efficient and environmentally friendly.

The majority of alternative stones are much less expensive than their mined counterparts. Since each stone is so different, it’s hard to pinpoint an exact range, but some, like Nexus Diamond™ alternatives, may be up to 80% less than mined diamonds. The exact cost comparison will depend on which alternative stone you choose.

Diamond alternatives are not only much less expensive, but they also have great environmental and ethical benefits. Similar to lab diamonds, the production of diamond simulants does not require the displacement of the thousands of pounds of earth needed to find a diamond in the rough. There is also no chemical runoff from strip mining, which destroys sea habitats for generations. Environmental concerns are almost completely eliminated with alternative stones.

A depiction of the environmental damage caused by diamond mining.


If you are deciding on which stone to purchase, when custom designing an engagement ring or piece of fine jewelry, weigh your options across these three popular diamond alternatives.


The Nexus Diamond, from our sister company Diamond Nexus, is a simulant stone that most closely resembles the same physical and optical characteristics of a perfect natural diamond. It is IF rated (internally flawless), G color (colorless) and Ideal Cut for maximum brilliance and fire. Moreover, unlike a mined diamond, it is guaranteed to never chip, crack or discolor, making it an heirloom quality stone that will last a lifetime.

The Nexus Diamond is made of a proprietary substrate and patented coating material that results in a heavier, harder and more durable alternative stone. It rates a 9.1 to 9.2 on the Mohs scale. In relation to brilliance, the coating material disperses light at a much closer rate to a natural diamond, resulting in the perfect amount of sparkle.

The Nexus Diamond Is the highest quality alternative stone relative to price. It costs up to 80% less than a mined diamond, while keeping all of the qualities that make a perfect diamond so captivating.


Cubic zirconia (CZ) is one of the most well-known alternative stones, commonly sold in inexpensive jewelry. However, there is a big difference between cubic zirconia and lab created diamonds or natural diamonds. Although a well-cut CZ may look fairly close to a natural diamond at first, it is very porous, which results in the absorption of contaminants. Eventually, a CZ will become discolored and dull over time.

CZ is made of zirconia dioxide, which disperses light at a much higher rate than a diamond. This is responsible for the “fire” of a stone and will sparkle more than a diamond, sometimes resulting in flashes of rainbow color. It also has a lower refractory index, meaning it does not capture light in the same way a diamond does.

Cubic zirconia is softer than a diamond. It rates an 8 on the Mohs scale, which may cause it to chip or crack much more easily. CZ might be a good choice for an inexpensive set of earrings, but will not hold up for the everyday wear of an engagement ring.


Moissanite is made of silicon carbide and is also a very common alternative stone used in inexpensive jewelry. Natural moissanite is extremely rare, so most stones of this category that you come in contact with are lab created.

There is a large market for these simulants in jewelry, although their characteristics are far from those of a natural diamond. Due to moissanite’s high amount of brilliance and light dispersion, it produces a “disco ball” like sparkle. This means it is extremely sparkly and commonly reflects rainbow light.

In comparison to CZ, moissanite is a harder stone and much more comparable to a diamond. It rates a 9.2 on the Mohs scale, so it’s less likely to chip or crack during daily wear. It may be durable enough to be set in an engagement ring, but it won’t visually match the look of a diamond.


Lab diamonds and diamond alternatives differ in many ways due to their compositional and optical differences. However, since different diamond alternatives vary so greatly, it is difficult to make direct comparisons between alternatives. The main take-away is that lab diamonds are compositionally the same as mined diamonds and diamond alternatives are not.

Text that reads: Lab diamonds equal mined diamonds. Text that reads: Diamond alternatives do not equal mined diamonds.

The best way to decide which option is right for you is to think about what qualities of a specific stone matter most. If you want the chemical make-up of a diamond without the environmental and ethical concerns, then a lab diamond is right for you. On the other hand, if composition does not bother you, and rather, the optical characteristics are more important, then a diamond alternative might be a better option.

It’s a true win, win, win scenario - a win for the environment, a win for your wallet and a win for you.

Would you design with a lab grown diamond?

Tell us in the comments!