Which is Better CVD or HPHT Diamond? Know Your Lab Diamond Lingo!
Diamonds have long been the symbol of timeless beauty and love, but with advancements in technology, lab-grown diamonds are becoming an increasingly popular choice. Two of the most common methods of creating lab-grown diamonds are Chemical Vapor Deposition (CVD) and High Pressure High Temperature (HPHT). But which one is better? Let's dive into the lingo and explore the key differences to help you make an informed decision.
Understanding the difference between CVD and HPHT lab-grown diamonds can be daunting for anyone who is new to the world of lab diamonds. In short, CVD diamonds are created in a vacuum chamber using carbon-rich gases, while HPHT diamonds are formed under extreme pressure and heat, similar to natural diamonds. Both processes produce stunning stones, but there are subtle differences in their formation that may influence your choice.
How Are CVD Diamonds Made?
CVD diamonds are produced by placing a diamond 'seed' in a vacuum chamber, which is then filled with carbon-rich gases like methane. These gases are ionized, and the carbon atoms bond to the diamond seed, layer by layer, forming a larger diamond crystal. This method allows for precise control over the diamond's growth, resulting in diamonds that are often more affordable and eco-friendly. Because of their purity and consistent formation, many jewelers prefer CVD diamonds for their diamond rings and other fine jewelry.
How Are HPHT Diamonds Made?
On the other hand, HPHT diamonds are created by replicating the natural diamond-forming process. A small diamond seed is placed into a chamber that mimics the intense pressure and high temperatures found deep within the Earth's mantle. While this method creates diamonds that can be chemically identical to natural diamonds, HPHT diamonds may have slight color tints due to the presence of metallic inclusions used during the growth process. Despite this, HPHT diamonds are often favored in the press for their close resemblance to naturally occurring diamonds.
The Look: CVD vs. HPHT
When it comes to visual appeal, both CVD and HPHT diamonds can be flawless. However, CVD diamonds tend to have fewer inclusions and are known for their superior clarity. This makes them a great choice for those looking for stunning diamond studs or solitaire pendants. HPHT diamonds, while often clear and brilliant, may have more internal inclusions due to the extreme conditions under which they are formed, which can slightly affect their appearance. Still, both types of diamonds offer exceptional brilliance and are available in a range of cuts and settings.
Testing: Will a Diamond Tester Show the Difference?
One of the key concerns for many buyers is whether a lab-grown diamond will pass a diamond tester. The good news is that both CVD and HPHT diamonds will test as real diamonds because they are chemically identical to natural diamonds. However, there is a subtle distinction: CVD diamonds tend to show clearer results on testers, making them a reliable option for those who want peace of mind when purchasing lab-grown diamond jewelry.
So, Which Is Better?
The answer to this question largely depends on your preferences. If you're looking for a diamond with exceptional clarity and minimal inclusions, CVD may be the better choice. Its eco-friendly production process and consistent quality make it an appealing option for fine jewelry such as eternity bands and tennis bracelets. On the other hand, if you prefer a diamond that closely resembles a natural stone in both formation and appearance, HPHT diamonds may suit your needs. Many in the press argue that HPHT diamonds come closer to natural diamonds in terms of the growth process, but remember that either option will result in a beautiful, sparkling gemstone.
Make the Right Choice for You
Whether you choose CVD or HPHT, both types of lab-grown diamonds are ethically sourced and environmentally conscious. If you're considering a custom piece of jewelry like an engagement ring or an exquisite pair of hoop earrings, lab-grown diamonds provide the same luxury and brilliance as natural diamonds without the hefty price tag.
At Robinson's Jewelers, we offer a wide selection of lab-grown diamond jewelry to suit every taste and style. Visit our online store today to explore our collection of rings, necklaces, and earrings, or contact our experts for guidance on choosing the perfect piece.