How Long Does It Really Take to Make a Lab Diamond – 2024 Guide


For decades, diamonds have been a symbol of love, luxury, and prestige. However, the traditional method of mining them can be controversial, as it involves environmental and ethical concerns. In recent years, lab-grown diamonds have emerged as a more sustainable and ethical alternative to mined ones. Not only are they eco-friendly and conflict-free, but they also offer a more affordable option for consumers. But, how long does it really take to make a lab diamond?

The Diamond-Making Process in Detail

To understand how long it takes to make a lab-grown diamond, we first need to understand the process of how they are made. In the lab-grown diamond-making process, a small “seed” crystal is placed in a chamber with a mixture of gasses. The gasses are then heated to a very high temperature and pressure, simulating the conditions deep within the earth where their natural counterparts are formed. As the gasses cool, the carbon atoms within them bond to the seed crystal, layer by layer, eventually forming a diamond.


Factors that Affect Diamond Growth Time

Several factors can impact the time it takes to grow a diamond. The first and most significant factor is the desired size of the diamond. Larger ones take longer to grow than smaller ones, as they require more carbon atoms to bond to the seed crystal. The purity of the gasses used in the process also affects growth time, as impurities can slow down the growth rate. Additionally, the temperature and pressure within the chamber must be precisely controlled, as any fluctuations can affect its growth rate.

Comparison of Time to Grow a Diamond vs. Mine One

Mining a diamond from the earth can take anywhere from several weeks to several months, depending on the location and size of the mine. The process involves digging large pits or tunnels into the earth, then sifting through the dirt and rock to find them. This process can have a significant environmental impact, including habitat destruction and soil erosion. Additionally, the mining process is often associated with poor labor conditions and human rights abuses.

On the other hand, lab-grown ones can take anywhere from several weeks to several months to grow, depending on the desired size and quality. While the diamond-making process does require energy and resources, it is much less damaging to the environment than mining. Additionally, they are guaranteed to be conflict-free and ethically sourced, providing peace of mind to consumers.

Average Growth Time for Lab Diamonds

The average growth time for a lab-grown diamond can vary depending on the factors mentioned above. On average, it takes between 6-10 weeks to grow a one-carat diamond. However, larger ones can take significantly longer, with some taking up to several months to reach their desired size.


Fastest and Slowest Growth Times Recorded

The fastest growth time for a lab-grown diamond on record is just three days, achieved by New Diamond Technology in Russia in 2016. However, this diamond was only 2.8 carats and was grown using a technique called Chemical Vapor Deposition (CVD), which is not commonly used in the industry. The slowest growth time on record is 120 days, achieved by the Singapore-based company IIa Technologies. This one was a whopping 10.02 carats and was grown using the High Pressure-High Temperature (HPHT) method.

Impact of Growth Time on Diamond Quality

The length of time it takes to grow a diamond can impact its quality in several ways. If the growth rate is too fast, the carbon atoms may not have enough time to bond correctly, leading to imperfections in its structure. On the other hand, if the growth rate is too slow, the carbon atoms may start to clump together, forming unwanted inclusions. The optimal growth time for a lab-grown diamond will depend on the desired size and quality, and it is up to the manufacturer to strike a balance between growth time and its quality.

Cost Implications of Longer Growth Times

The length of time it takes to grow a diamond can also impact its cost. As the growth time increases, so does the cost of production, as more resources and energy are required to sustain the growth process. Additionally, the longer it takes to grow, the more opportunity cost there is for the manufacturer, as they could have used that chamber space and resources to grow more diamonds. This can lead to longer growth times resulting in higher prices for consumers.


Lab-Grown Diamond Engagement Rings

One of the most popular uses for diamonds is in engagement rings, and lab-grown diamonds are no exception. Lab grown diamond engagement rings offer the same sparkle and beauty as their mined counterparts, but with the added benefits of sustainability and ethical sourcing. Additionally, they often come with a lower price tag than mined ones, making them a more accessible option for couples on a budget.

Latest Innovations in Diamond-Growing Technology

The diamond-growing industry is constantly evolving, with new techniques and technologies being developed to improve the quality and efficiency of lab-grown diamonds. One recent innovation is the use of plasma-enhanced chemical vapor deposition (PE-CVD), which can produce high-quality ones with fewer defects than traditional CVD methods. Another innovation is the use of microwave technology in the growth process, which can reduce growth time and energy consumption.

Future Prospects for Lab-Grown Diamonds

As technology continues to improve and consumer awareness of environmental and ethical issues grows, the demand for lab-grown diamonds is expected to increase. The lab-grown diamond market is projected to grow at a CAGR of 7.5% from 2021 to 2028, reaching a market size of $13.1 billion by 2028. Additionally, advancements in technology are expected to lead to lower production costs and higher quality diamonds, making them even more attractive to consumers.



In conclusion, the length of time it takes to grow a lab-grown diamond can vary depending on several factors, including the desired size and quality of it. While the process can take several weeks to several months, it is much more environmentally friendly and ethical than mining. Additionally, lab-grown ones offer a more affordable option for consumers, making them a popular choice for engagement rings and other jewelry. As technology continues to improve, the future looks bright for the lab-grown diamond industry, with increased demand and higher-quality pieces on the horizon.