As the demand for lab-grown diamonds continues to grow, terms like CVD diamond and HPHT diamond are becoming more common. But what exactly is a CVD diamond? How is it different from a natural diamond—or even from other lab-grown diamonds?
At KRK Jewels, we believe in full transparency and education when it comes to choosing fine jewelry. In this blog, we’ll explore what a CVD diamond is, how it’s created, and why it’s a brilliant, ethical, and affordable alternative to mined diamonds.
What Does “CVD Diamond” Mean?
CVD stands for Chemical Vapor Deposition—a cutting-edge method of creating lab-grown diamonds. A CVD diamond is a real diamond that is grown inside a laboratory using carbon-rich gases. The process recreates the natural diamond-growing conditions but in a controlled, sustainable environment.
CVD diamonds are chemically, physically, and optically identical to natural diamonds. That means they sparkle just as beautifully, last just as long, and can be graded using the same 4Cs: Cut, Color, Clarity, and Carat.
How Are CVD Diamonds Made?
The CVD process begins with a small diamond “seed” placed inside a sealed chamber. This chamber is filled with gases like methane and hydrogen, and heated to high temperatures. Under these conditions:
Carbon atoms are released from the gas.
The carbon slowly bonds and deposits onto the seed.
Over a few weeks, a crystal structure grows—layer by layer—into a full-sized diamond.
The resulting stone is then cut, polished, and graded just like a mined diamond.
CVD vs HPHT Diamonds
There are two main types of lab-grown diamonds: CVD and HPHT (High Pressure High Temperature).
| Feature | CVD Diamond | HPHT Diamond |
|---|---|---|
| Growth Process | Chemical Vapor Deposition | High Pressure High Temperature |
| Temperature | ~800–1200°C | ~1400–1600°C |
| Cost-Effectiveness | Generally more affordable | Slightly more expensive |
| Color Range | Often near-colorless to faint | Broad, including colorless |
| Post-Growth Treatment | May be treated to improve color | Rarely needed |
At KRK Jewels, we offer both types, helping our customers find the perfect match based on quality, budget, and personal preference.
Are CVD Diamonds Real?
Yes, CVD diamonds are 100% real diamonds.
They are not synthetic or fake. They’re made of pure carbon atoms arranged in the same crystal structure as mined diamonds. Even trained gemologists need advanced equipment to tell them apart.
CVD diamonds:
Have the same hardness (10 on the Mohs scale)
Are graded by IGI or GIA
Can be certified just like natural stones
Will last forever—just like love
Conclusion
So, what is a CVD diamond?
It’s a real diamond grown in a lab through advanced technology, offering exceptional beauty, ethical sourcing, and value for money. Whether you’re drawn to lab-created options for their sustainability, quality, or price point, CVD diamonds are an excellent choice for modern buyers.
