CVD vs HPHT: Select by Specification and Application

CVD and HPHT are different diamond growth routes. Neither label alone determines whether a stone or material is appropriate for a buyer's project.

CVD Lab-Grown Diamonds

CVD diamonds are grown from carbon-containing gases in a controlled deposition environment. The category includes both gem-quality diamonds and technical CVD materials, so the intended use must be defined clearly.

• Separate jewelry-grade CVD stones from industrial CVD materials

• Specify loose-stone 4C requirements or technical material parameters

• Use the dedicated CVD page for growth-method purchasing terms

HPHT Lab-Grown Diamonds

HPHT diamonds are grown under high-pressure and high-temperature conditions. Jewelry buyers should distinguish HPHT-grown diamonds from post-growth HPHT treatment terminology.

• Confirm whether the request refers to growth method or treatment

• Provide carat, shape, color, clarity and cut requirements

• Use the dedicated HPHT page for product-specific inquiries