CVD Diamonds And HPHT Diamonds: Understanding The Differences

When it comes to lab-grown diamonds, two of the more common types of diamond growth methods are CVD diamonds and HPHT diamonds. Both of these options will yield diamonds that are real diamonds and have the same chemical and physical properties as mined diamonds; however, the processes and end products differ. If you ever wondered which option is better for your jewellery purchase, we can help clear this up with this simple breakdown of CVD vs HPHT.

What Are CVD Diamonds?

CVD diamonds are produced using the Chemical Vapour Deposition process. You can start with a diamond seed that is placed inside an environment of carbon-rich gas. The HCVD process involves heating the gas and allowing carbon atoms to crystallise onto the original seed, layer at a time, until a diamond is either grown or fabricated.

CVD diamonds offer improved clarity and fewer inclusions than mined diamonds. They are well-suited to fine jewellery items such as engagement rings and pendants. CVD diamonds are generally recognised as one of the more sophisticated processes for growing diamonds.

Due to these various factors, CVD diamonds rapidly gained popularity among new diamond shoppers, wanting sustainably crafted, excellent quality diamonds for their jewellery.

What Do You Need To Know About HPHT Diamonds?

High Pressure High Temperature (HPHT) diamonds are produced in the lab to replicate the conditions in which diamonds grow naturally in the Earth. The HPHT process starts with a diamond seed that is subjected to tremendous heat and pressure, which grows the crystal.

• HPHT diamonds are often yellowish due to the presence of nitrogen.
• HPHT diamonds are more often used in the lab to grow smaller stones or industrial diamonds.
• In some cases, they are more cost-effective compared to the CVD process.

Many consumers still like HPHT diamonds; however, those looking for a more aesthetically pleasing diamond tend to prefer CVD diamonds. If you are looking for a high-quality diamond product and are willing to spend a little more, the CVD diamond option is the best choice.

CVD Vs HPHT: Which One Should You Choose?

While both CVD and HPHT diamonds are real diamonds that are durable and brilliant, here is the comparison to consider:

CVD Diamonds

• Higher clarity and fewer metal inclusions.
• More environmentally friendly than HPHT diamonds.

HPHT Diamonds

• More likely to have different colour tints and are available in smaller sizes. In many cases, it is less expensive than CVD.
• If you are looking for high-quality, long-lasting diamonds, CVD is usually the better choice.

Discover Lab-Grown Diamond Jewellery

If you are deciding between lab-grown diamond types or shopping for modern designs, also explore jewellery that suits your lifestyle as well. Our lab-grown diamond earrings and lab-grown diamond pendants work well with either CVD or HPHT stones, offering an option of timeless elegance with a sustainable option.

Frequently Asked Questions About Lab-Created Diamonds

1. Are CVD diamonds real diamonds?

CVD diamonds do have the same chemical and physical structure as mined diamonds.  They are all real diamonds.

2. Do HPHT diamonds last as long as CVD diamonds?

Both CVD and mined diamonds have the same hardness and durability, as well as lasting a lifetime.

3. Can you tell the difference between CVD and HPHT diamonds?

Not at all. To differentiate between CVD and HPHT diamonds, you need professional gemological equipment.

4. Are lab-created diamonds less expensive than mined diamonds?

Yes. Both CVD diamonds and HPHT diamonds are typically 30-40% less expensive than mined diamonds.

5. Is one better to purchase for jewellery - CVD or HPHT?

Most purchasers prefer CVD diamonds for jewellery because they have higher clarity and consistency. HPHT diamonds are okay for smaller stones as well.