When shopping for jewellery, particularly engagement rings, you’re faced with more choices than ever before. Gone are the days when natural diamonds were the only option. Today, consumers can choose from natural diamonds, lab-grown diamonds, moissanite, and cubic zirconia—each with its own set of characteristics, benefits, and price points.
This comprehensive guide will help you understand the key differences between these four options, enabling you to make an informed decision that aligns with your values, preferences, and budget.
Natural diamonds are formed deep within the Earth’s mantle over billions of years under extreme heat and pressure. They are mined from the ground, cut, and polished before reaching the jewellery market. Natural diamonds are composed of pure carbon arranged in a crystal structure, making them the hardest natural substance on Earth.
Lab-grown diamonds (also called lab-created or cultured diamonds) are real diamonds produced in controlled laboratory environments. Using either High Pressure High Temperature (HPHT) or Chemical Vapor Deposition (CVD) methods, scientists replicate the conditions that create natural diamonds. The result is a stone that is chemically, physically, and optically identical to a mined diamond.
Moissanite was first discovered in 1893 by Henri Moissan in a meteor crater. Natural moissanite is incredibly rare, so virtually all moissanite sold today is lab-created. It’s composed of silicon carbide and, while similar in appearance to diamond, has different optical properties—including more fire (colourful light dispersion) and a slightly different refractive index.
Cubic zirconia is a synthetic crystalline material made from zirconium dioxide. It’s been used as a diamond simulant since 1976 and is produced entirely in laboratories. While CZ can look similar to diamond at first glance, it has distinctly different physical and optical properties.
Hardness is measured on the Mohs scale, which determines a stone’s resistance to scratching:
For everyday wear, especially in engagement rings, hardness matters significantly. Diamonds (both natural and lab) and moissanite will maintain their polish and resist scratches for a lifetime. Cubic zirconia, however, will show wear over time, becoming cloudy and scratched with regular use.
The way a stone interacts with light creates its sparkle:
This is where the differences become stark. For a 1-carat equivalent stone of excellent quality:
The price gap is substantial and often the deciding factor for many buyers.
After examining all four options, lab-grown diamonds emerge as the clear winner for value-conscious buyers. Here’s why:
Lab-grown diamonds are not imitations or simulants—they ARE diamonds. Every gemological property, from hardness to brilliance, is identical to natural diamonds. The only difference is their origin. This means you get genuine diamond beauty and durability at 40-60% less than mined diamonds.
Unlike moissanite and cubic zirconia, lab-grown diamonds don’t have optical differences that can give them away. There’s no “disco ball” effect, no colour tints, and no durability concerns. Your lab diamond will look, feel, and perform exactly like a natural diamond because it IS a diamond.
Lab-grown diamonds completely sidestep the ethical concerns surrounding mined diamonds. There’s no environmental degradation from mining, no potential for conflict funding, and full transparency in the production chain. For socially conscious consumers, this alone makes lab diamonds the superior choice.
Like natural diamonds, lab-grown diamonds are graded and certified by respected gemological laboratories including GIA and IGI. You receive the same assurance of quality and the same protection for your investment.
Unlike cubic zirconia that will scratch and cloud over time, your lab-grown diamond will look exactly the same in 50 years as it does today. It’s a forever stone at a fraction of the forever price.
The lab-grown diamond market has matured significantly, with major jewellers worldwide embracing these stones. They’re not a compromise or consolation prize—they represent the smart choice for modern consumers who want genuine quality without the inflated prices associated with mining and supply chain markups.
While each option has its place in the market, lab-grown diamonds stand out as the optimal choice for buyers seeking the perfect balance of quality, ethics, and value. You get everything that makes diamonds special—the brilliance, the hardness, the prestige—without the premium associated with natural mining or the compromises that come with simulants.
At Annabels Fine Jewellery, we proudly offer an exceptional collection of lab-grown diamonds. Our experts can help you select the perfect stone that maximises both beauty and value, ensuring you receive a piece of jewellery you’ll treasure for a lifetime.
*Ready to explore lab-grown diamonds? Book a consultation with our jewellery experts and discover the exceptional value for yourself.*
Empowering you with insights for selecting and acquiring the ideal ring.
