At first glance, moissanite and diamond may appear similar in their brilliant sparkle, but their origins, properties, and visual characteristics tell vastly different stories. This article explores their key differences through scientific facts and visual comparisons, helping buyers make informed decisions based on accurate information rather than misconceptions.

Can you spot the differences? Don't worry if you can't - we'll unravel the mystery for you!

Chemical Composition & Origin

Moissanite is not a lab-grown diamond—it is an entirely distinct gemstone with unique properties. The confusion between the two arises from their shared status as lab-created alternatives to mined diamonds, but their atomic structures reveal fundamental differences.

Moissanite: Born from the Stars
Originally discovered in meteorites, moissanite is composed of silicon carbide (SiC). Natural moissanite is exceptionally rare, so all moissanite used in jewelry today is lab-created. Its hexagonal crystal structure produces optical effects that differ significantly from diamonds.

Diamond: Earth's Carbon Masterpiece
Both natural and lab-grown diamonds are pure carbon crystals with a cubic atomic arrangement. As noted by Doveggs' gemological team, their "old euro round lab grown diamonds share identical physical and optical properties with mined diamonds".  The only difference is their origin-one forms underground over billions of years, while the other is created in controlled laboratory environments.

Physical Properties: Hardness, Brilliance & Fire

Understanding how these gems perform in terms of durability and light interaction helps explain why they appeal to different preferences.

Durability Comparison

While diamonds rank higher on the Mohs scale, moissanite's excellent toughness makes it highly resistant to chipping, suitable for everyday jewelry.

Optical Performance
Moissanite's higher refractive index (2.65 vs. diamond's 2.42) results in more dramatic rainbow flashes, known as "fire." Diamonds, on the other hand, prioritize white light brilliance with subtler dispersion. According to Doveggs, "In antique cuts like old mine cushion lab grown diamonds, moissanite's fire enhances vintage charm, while diamonds offer classic elegance."

Video Showdown: Antique Cuts Compared

(Embed: Split-screen footage comparing moissanite and lab diamond in three key cuts.)

Old European Round

• Lab Diamond: Soft, chunky facets create a "hall of mirrors" effect with balanced brilliance.

• Moissanite: Increased fire makes facet patterns appear more dynamic, with vivid flashes.

      ●Side-by-side video of old European cut (moissanite vs diamond)

Old Mine Cushion

• Lab Diamond: Uniform "crushed ice" sparkle with gentle light dispersion.

• Moissanite: Amplifies the vintage "broken glass" look with colorful fire in each facet.

     ●Side-by-side video of old mine cut (moissanite vs diamond) 

Pear Rose Cut

• Lab Diamond: Relies on precise facet angles to reflect light upward.

• Moissanite: Transforms the flat cut into a radiant display of spectral colors.

• Side-by-side video of rose cut (moissanite vs diamond)
  

Were you able to spot the differences? In DovEggs‘s side-by-side comparison video above, the left stone is diamond while the right is moissanite, shown in three distinctive antique cuts. The comparison highlights how antique cuts emphasize their distinct optical behaviors—moissanite's fiery personality versus diamond's timeless glow.

 

Price & Practical Considerations

Price Comparison (Per Carat at Doveggs)

Budget Breakdown:

1. $100-$300 Range

   • 1ct moissanite solitaire ($76 stone + $150 setting)

   • 0.5ct lab diamond in simple setting

2. $300-$800 Range

   • 1.5ct moissanite in premium setting

   • 1ct lab diamond with IGI certification

3. $800+ Range

   • 2ct+ moissanite designer pieces

   • 1.5-2ct lab diamonds in antique cuts

*(All prices are based on Doveggs' 2025 standard pricing, with variations depending on specific designs.)*

Debunking Myths: "Is Moissanite a Lab Diamond?"

Despite their shared lab origins, moissanite and lab diamonds are fundamentally different:

• Lab diamonds are chemically identical to mined diamonds.

• Moissanite is a distinct mineral with its own optical properties.

Both are conflict-free, but moissanite production has a smaller carbon footprint. As Doveggs notes, "We offer both options to cater to different preferences—neither is 'better,' just different."

Ultimate Buyer’s Guide: How to Choose Between Moissanite and Lab Diamonds

1. By Priorities

Choose Moissanite When You Want:
✓ Maximum value - Save 60-80% vs diamonds while getting 95% visual impact
✓ Bold personality - Vibrant rainbow flashes ("fire") perfect for fashion jewelry
✓ Size advantage - Afford larger carat sizes (e.g., 2ct moissanite ≈ $400 vs $2,000+ for lab diamond)
✓ Low maintenance - 9.25 Mohs hardness withstands daily wear

Choose Lab Diamonds When You Need:
✓ True diamond quality - Identical physical/chemical properties to mined diamonds
✓ Heirloom potential - 10 Mohs hardness for multi-generational wear
✓ Classic brilliance - Pure white light return with superior transparency (fewer inclusions than natural diamonds)
✓ Ethical assurance - Conflict-free with 30% lower carbon footprint than mining

2. By Cutting Style

3. Smart Selection Strategy

• First-time buyers: Start with 1ct moissanite ($76-$150) to test styles
• Engagement rings: Consider 1-1.5ct lab diamonds ($800-$1,500) for tradition
• Statement pieces: 2ct+ moissanite delivers bold look under $500

Pro Tip: "Pair moissanite fashion rings with lab diamond engagement sets - 72% of Doveggs customers mix both."

Conclusion: Two Gems, Two Identities

Moissanite and lab-grown diamonds cater to different tastes and budgets. Understanding their differences ensures buyers select the perfect stone—whether drawn to moissanite's vibrant personality or a diamond's timeless appeal.

Final Tip: Always view stones in person or through high-quality videos to appreciate their true character.

[Discover Doveggs' Diamond Collection →]