What equipment can be used to see the characteristic terrace and riser growth sectors in CVD lab-grown diamonds?

• A. UV lamp
• B. Spectroscope
• C. DiamondView
• D. Refractometer

Answer: (C)

Seeing terrace and riser growth sectors in CVD lab-grown diamonds relies on an imaging tool that makes internal growth zoning clearly visible. DiamondView does this by using short-wave ultraviolet light to excite fluorescence in the diamond. The resulting fluorescence patterns highlight the distinct growth layers formed during CVD deposition, producing the characteristic terrace and riser sectors. This level of detail in growth zoning is not normally visible with standard UV lamps, nor can a spectroscope reveal growth patterns, and a refractometer measures refractive index rather than internal growth features. So DiamondView is the specialized instrument designed to reveal those terrace and riser sectors, helping distinguish synthetic CVD diamonds from natural stones.