As a jewelry designer or retailer, you've likely encountered this issue: You order a "G" color CVD diamond, but when it arrives, it has a faint brownish or grayish haze.
This is the "CVD Tint" problem. And it's why, for premium engagement rings, HPHT is reclaiming the throne.
The "As-Grown" Advantage of HPHT
HPHT (High Pressure High Temperature) mimics the Earth's natural crushing force. The result? Diamonds that are naturally colorless.
- HPHT: Typically yields D, E, F colors naturally. The crystal structure is dense and crisp.
- CVD: Often grows brown. To fix this, many CVD stones undergo "Post-Growth Treatment" (HPHT annealing) to whiten them. But this can sometimes leave a milky or gray cast.
Why Designers Choose Kunlun's HPHT
At Kunlun Growth, we specialize in As-Grown HPHT. We don't sell treated stones that fade or look hazy.
If you are setting a diamond in White Gold or Platinum, any body color will be visible. For these settings, an HPHT D-E color stone is the only safe choice to ensure that "icy white" look your clients expect.
"I switched my pave melee and center stones to Kunlun's HPHT, and the brightness difference is night and day." — A Client from Texas
Don't Compromise on Color
Browse our inventory of hand-selected, D-E Color HPHT diamonds. Perfect for high-end bridal jewelry.
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