Start with Our Diamond Quiz
Simulated Diamond Meaning: How Are They Different Than Diamonds?
A simulated diamond is a gemstone that resembles a natural diamond visually but has different chemical and physical properties. While they may appear similar at first glance, the properties, composition, and creation process differ between simulated diamonds and real diamonds. This means lab grown diamonds are not diamond simulants because lab grown diamonds have the same physical, chemical, and visual properties as diamonds. The primary differences between diamonds and simulated diamonds are:
Composition and Physical Properties
Diamonds are made of carbon atoms in a cubic crystal structure, giving them unmatched hardness and distinct brilliance. Lab grown diamonds share this chemical composition. In contrast, diamond simulants like cubic zirconia (made of zirconium dioxide) are typically softer and less durable than diamonds.
Optical Characteristics
Diamonds have a high refractive index and strong dispersion, resulting in their unique sparkle. Simulants, such as cubic zirconia, have different refractive and dispersion rates, which can lead to variations in brilliance and the colors they display.
Value and Durability
Diamonds are valued for their rarity, beauty, and durability. Simulants are generally more affordable but less durable, based on the Mohs scale.
Simulated Diamond vs. Lab Diamond
Lab grown diamonds are not diamond simulants. They are real diamonds. Lab grown diamonds are created using advanced technological processes that replicate the natural conditions under which diamonds form. Lab grown diamonds are chemically, physically, and optically identical to natural diamonds. They have the same hardness, brilliance, and durability.
Diamond simulants look like diamonds but do not share their properties. They do not mimic the formation process of natural diamonds but aim to replicate their appearance. While lab grown diamonds are indistinguishable from natural diamonds to the naked eye, simulants can be identified by their differing optical and physical properties.
Lab-grown diamonds and simulated diamonds are fundamentally different:
Fundamental Differences
Lab-grown diamonds are genuine diamonds with identical chemical, physical, and optical properties as natural diamonds, just created in laboratories rather than mined. Simulated diamonds only resemble diamonds visually with entirely different compositions and structures.
Creation Process
Lab diamonds form through High Pressure High Temperature or Chemical Vapor Deposition. Simulants are manufactured through various processes specific to each material type.
Certification
Lab diamonds receive standard diamond grading (4 C’s: cut, color, clarity, carat) from major gemological laboratories. Simulants cannot be graded on the same diamond scales and don't receive traditional diamond certifications.
Popular Diamond Simulants
Several materials are commonly used as diamond simulants, each with its own unique characteristics.
Moissanite
Moissanite is a popular and stunning diamond alternative, known for its exceptional brilliance and fire. It is nearly as hard as a diamond, scoring 9.25 on the Mohs scale, making it a durable option for everyday wear. Moissanite’s refractive index is higher than that of diamond, giving it a unique sparkle that some call a “rainbow effect.”
Moissanite Guide | Shop Moissanites
Cubic Zirconia (CZ)
Cubic zirconia is one of the most well-known diamond simulants. It is prized for its high brilliance and clarity, which closely resemble those of a real diamond. However, it is softer than a diamond, rating about 8.5 on the Mohs hardness scale compared to diamond’s 10. Cubic zirconia is also heavier than a diamond and can exhibit a slightly stronger brilliance. Brilliant Earth does not offer cubic zirconia.
*Please note that Brilliant Earth does not carry cubic zirconia.
Cubic Zirconia vs. Moissanite Guide | Cubic Zirconia vs. Diamond Guide
Glass
Glass is a less common material for diamond simulants. It is significantly softer than both cubic zirconia and moissanite, making it more prone to scratching and damage. Its optical properties also fall short of replicating the brilliance and fire of a real diamond. Brilliant Earth does not carry any glass diamond simulants.
*Please note that Brilliant Earth does not carry glass.
How to Tell the Difference Between Diamond Simulants and Diamonds
Visual Inspection
Under magnification, simulants often show different optical properties. For example, cubic zirconia may exhibit less clarity and a more intense sparkle when compared to diamonds. Moissanite displays double refraction, causing a visual doubling effect on facets.
Professional Appraisal
A professional gemologist can quickly provide a definitive determination if a stone is a diamond or a simulant.
Understanding the differences between diamond simulants and real diamonds is important for making informed decisions about purchases. Diamond simulants offer a cost-effective alternative with a similar appearance to diamonds but come with different properties and durability levels. Recognizing these differences helps ensure that you select the right stone for your jewelry.
