CVD vs HPHT: Which Lab-Grown Diamond Process Is Better?

Introduction: Two Methods, One Brilliant Outcome

 

Lab-created diamonds are making the jewelry industry happy because they are sustainable, ethical, and no less beautiful than mined diamonds. Nevertheless, are you aware of the fact that not all lab-grown diamonds are produced by the same method? The two most popular methods are CVD (Chemical Vapor Deposition) and HPHT (High Pressure High Temperature). Both produce natural diamonds but are different in their method, crystal structure, and even color. So, which one is the best? Go through the comparison.

What is HPHT?

HPHT (High Pressure High Temperature) is a process so similar to the natural diamond-forming process that it is actually using the conditions created deep in the Earth. Carbon is subjected to very high pressure (approximately 5 GPa) and very high temperature (about 1500°C) in order to form a diamond crystal.

Main Characteristics of HPHT Diamonds:

• Usually carry a yellowish or brownish tone (can get color-enhanced)
• Produced at a higher rate than CVD diamonds
• Generally, they have the presence of metallic inclusions (resulting from metal catalysts)
• They are the main source of industrial applications, but also used in fine jewelry.
  
  

Advantages:

 

• Cheaper to make in large quantities
  
• Easier to get larger sizes
  
• Suitable for high-volume commercial production
  
  

Disadvantages:

 

• They might have some small spots or the color is a bit different.
  
• The method uses more energy.
  
  

What is CVD?

CVD through a different way of thinking is also mentioned. In short, a diamond seed is put in a vacuum chamber with carbon-based gases (like methane). On top of the seed thus formed, carbon atoms are deposited through a process of fragmentation of the gases and heat and plasma.

Main Characteristics of CVD Diamonds:

• Usually their color is very faint or close to colorless
• Metallic inclusions are less
  
• More precise control of quality and clearness
  
• After they are grown, they can be further improved if the condition is the best
  
  

Advantages:

 

• Better color and clarity
  
• Less environmental impact
  
• The first choice of the top-line custom jewelry market
  
  

Disadvantages:

 

• It is a slow process.
  
• They tend to be more expensive than HPHT.
  
  

CVD vs HPHT: Side-by-Side Comparison

Which Diamond Process is Better for You?
 

• For example, if you’re in the market for the best color, clarity, and brilliance—and especially if you are going to make custom engagement rings, hip-hop jewelry, or luxury pendants—then CVD diamonds are a more suitable option.
  
• If, on the other hand, you are more conscious about the price, you want larger sizes at affordable prices, or need diamonds for fashion-forward or commercial-grade jewelry, then HPHT diamonds give amazingly good value.
• On one hand, they are 100% natural diamonds, on the other hand, they are certified by leading gemological institutes like IGI and GIA, and even experts cannot distinguish them from mined diamonds just by the naked eye.
  
  

 

Conclusion: The Right Choice Depends on Your Goals

Both CVD and HPHT methods produce visually appealing, real lab-grown diamonds. The most suitable option will be your personal priorities, such as: clarity, color, size, price, or eco-friendliness.

CVD diamonds give purity at the highest level and are free from inclusions, which is great for people who are looking for a top-quality technologically advanced beauty product. While HPHT diamonds provide the highest brilliance at a cheaper price, which is suitable for the boldest and most statement pieces.

Regardless of the process, each diamond that is crafted by labgrownDiamJewel is ethically made, lab-certified, and meant to be shining for a lifetime. Interested in finding the diamond that is just the right one for you? We are on our way to conjure brilliance together.