Name two common diamond simulants.

• A. Cubic zirconia and moissanite
• B. Glass and quartz
• C. Amber and garnet
• D. Graphite and talc

Answer: (A)

Simulants are materials used to imitate diamond’s appearance without being diamond itself. Cubic zirconia and moissanite are the two most common diamond simulants because they can be produced cheaply and cut to resemble diamonds closely, delivering a brilliant sparkle. Cubic zirconia is a synthetic crystal that offers a strong, bright shine but is softer and wears more quickly than diamond. Moissanite, made from silicon carbide, has a higher refractive index and dispersion, giving it even more “fire” while still looking like a diamond in shape and brilliance. That combination of convincing sparkle, durability, and broad availability makes these two the standard go-to substitutes in jewelry. The other options don’t fit as well because they don’t combine the right optical properties, hardness, or practicality to serve as common diamond substitutes.