Which statement about the popularity of CZ as a simulant is accurate?

• A. All simulants look exactly like diamonds.
• B. Colorless sapphire and CZ are never used as simulants.
• C. The market includes diverse simulants, with CZ being widely used.
• D. Assembled simulants cannot have luster differences.

Answer: (C)

Diamonds have many look-alike options, so the market features a range of diamond simulants. Cubic zirconia stands out because it gives a convincing diamond-like sparkle at a much lower cost and is readily available in many sizes and shapes. Its optical properties—bright brilliance and dispersion—help it resemble diamond enough for everyday wear and testing, which is why it’s widely used as a simulant. That combination of affordability, availability, and appealing appearance makes this statement accurate: the market includes diverse simulants, with CZ being widely used. Other points aren’t as accurate: there are several simulants that resemble diamond, colorless sapphire and CZ are indeed used as simulants, and assembled simulants can show differences in luster depending on the materials involved.