Laboratory-grown diamonds are defined as what?

• A. A synthetic diamond created with different properties
• B. A manufactured diamond with essentially the same physical, chemical, and optical properties as natural diamond
• C. A diamond formed in meteorites
• D. A diamond imitating a color origin

Answer: (B)

Laboratory-grown diamonds are manufactured diamonds with essentially the same physical, chemical, and optical properties as natural diamonds. They are carbon crystals grown in controlled lab conditions, using methods such as HPHT or CVD, so the crystal structure, hardness, refractive index, dispersion, density, and thermal conductivity match those of natural diamonds. The key distinction is origin, not makeup; visually and chemically they’re indistinguishable in many respects, though growth patterns and trace elements can reveal a synthetic origin with testing. The other options describe diamonds formed in meteorites or imitations that only resemble diamonds in color origin, not the actual definition of lab-grown diamonds.