When it comes to choosing a sparkling gemstone for your jewelry, it can be difficult to tell the difference between lab-grown diamonds, moissanite, and cubic zirconia (CZ) just by looking at them. But each stone has unique qualities that affect its beauty, durability, price, and long-term value. Here's a breakdown to help you choose the right option for your style and budget.
Why Choose Lab-Grown Diamonds?
Lab-grown diamonds have taken the jewelry world by storm in recent years and for good reason. They offer the same stunning beauty and durability as mined diamonds but with a modern, ethical twist.

🔬 How They're Made
Lab-grown diamonds are created using two advanced methods:
- HPHT (High Pressure High Temperature): Mimics natural geological conditions.
- CVD (Chemical Vapor Deposition): Grows diamonds layer by layer in a vacuum chamber.
Both processes result in a gemstone that is chemically, physically, and optically identical to earth-mined diamonds.
✅ Pros
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⚠️ Cons
- Still more expensive than moissanite or CZ
Some people may prefer the “natural” origin of a mined diamond for symbolic reasons
💍 Popular Styles & Settings
Lab-grown diamonds are perfect for:
- Classic solitaire engagement rings
- Three-stone settings
Timeless tennis bracelets or diamond studs
🧼 Maintenance
Just like natural diamonds, lab-grown diamonds should be cleaned regularly with mild soap and a soft brush. Ultrasonic cleaners are also safe.
Best for: Engagement rings, timeless heirloom pieces, luxury jewelry lovers.
Why Choose Moissanite?
Moissanite offers brilliant sparkle and a modern alternative to diamonds at a fraction of the cost.

🌌 Origins
Originally discovered in a meteor crater by Nobel Prize winner Henri Moissan in 1893, moissanite is composed of silicon carbide. Because natural moissanite is extremely rare, all moissanite on the market today is lab-created.
✨ Sparkle Factor
Moissanite’s fiery rainbow flashes are due to its high refractive index (2.65–2.69), which is even greater than that of diamonds (2.42). This makes it one of the most brilliant gemstones available.
✅ Pros
- Affordable and visually stunning
- Nearly as durable as diamonds (9.25 Mohs)
- Available in a range of shapes and sizes
- Ethical, sustainable, and conflict-free
⚠️ Cons
- Some people find the rainbow sparkle too flashy or different from a diamond’s sparkle
- Slight color tint may appear in larger stones (especially under certain lighting)
💍 Popular Styles & Settings
Moissanite shines in:
- Halo engagement rings
- Vintage-inspired settings
- Large statement solitaires
🧼 Maintenance
Moissanite is easy to maintain and can be cleaned with warm soapy water or a non-abrasive jewelry cleaner.
Best for: Trendy, budget-conscious buyers looking for high brilliance in everyday or special occasion jewelry.
Why Choose Cubic Zirconia (CZ)?
Cubic Zirconia is a man-made gemstone created to closely resemble a diamond at a much lower cost.

🧪 What Is It Made Of?
CZ is made from zirconium dioxide and was first developed in the 1970s as an affordable alternative to diamonds.
✨ Appearance
When new, CZ is very clear and has a decent sparkle. However, it lacks the depth and fire of diamonds or moissanite and may appear glassy under light.
✅ Pros
- Extremely affordable
- Diamond-like appearance when new
- Widely available in many sizes, colors, and cuts
- Perfect for costume and travel jewelry
⚠️ Cons
- Softer than other gemstones (8–8.5 Mohs)
- Can become cloudy, scratched, or lose its luster over time
- Lower perceived value; not suitable for long-term investment
💍 Popular Styles & Settings
CZ is commonly used in:
- Fashion rings
- Earrings and bangles
- Temporary engagement or travel rings
🧼 Maintenance
CZ requires frequent cleaning to maintain its shine. Use a soft cloth and mild soap, and avoid harsh chemicals.
Best for: Budget-friendly fashion accessories, statement pieces, or temporary replacements.
✅ Comparison Table
Feature | Lab-Grown Diamonds | Moissanite | Cubic Zirconia (CZ) |
---|---|---|---|
Material | Pure carbon (same as natural diamond) | Silicon carbide | Zirconium dioxide |
Origin | Grown in lab (HPHT or CVD) | Grown in lab (originally found in meteorites) | Grown in lab |
Hardness (Mohs) | 10 | 9.25 | 8-8.5 |
Refractive Index (Sparkle) | 2.42 (classic brilliance) | 2.65–2.69 (very fiery) | 2.15–2.18 (brilliant but glassy) |
Color | Colorless to fancy colored | Slightly warm tones in larger sizes | Usually flawless, can appear overly white or artificial |
Affordability | $$$ | $$ | $ |
Best Used For | Engagement rings, fine jewelry, heirlooms | Affordable engagement rings, everyday wear | Costume jewelry, temporary or fashion pieces |
Maintenance Needs | Low – similar to natural diamonds | Low – easy to clean | Higher – can cloud, needs frequent cleaning |
HAVE ANY QUESTION?
Are lab-grown diamonds real diamonds?
Yes! Lab-grown diamonds have the same physical, chemical, and optical properties as mined diamonds.
Can moissanite be used in engagement rings?
Absolutely. Moissanite is durable enough for daily wear and offers excellent brilliance.
Does cubic zirconia last long?
CZ is more prone to scratches and clouding over time, so it’s best for occasional or fashion jewelry.
Which gemstone has the most sparkle?
Moissanite has the highest refractive index, which gives it a more fiery and rainbow-like sparkle compared to diamonds.
Are these stones ethically sourced?
Yes. All three options—lab-grown diamonds, moissanite, and CZ—are lab-created and conflict-free.