Buyers Guide

Moissanite vs Lab-Grown Diamonds: What’s the Difference?

When it comes to engagement rings, two gemstones stand out: moissanite and lab-grown diamonds. Both are beautiful, durable, and ethical, but they differ in sparkle, look, chemical composition, and price.

Moissanite is made of silicon carbide (SiC), a rare mineral first discovered in a meteor crater, while lab-grown diamonds are pure carbon, identical to mined diamonds. Both are now lab-created for ethical, sustainable jewellery, making them fully traceable and environmentally conscious.

Here is everything you need to know to choose the perfect stone for your engagement ring.

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✨ Origin and Story

Moissanite

Moissanite was first discovered in 1893 by Henri Moissan in a meteor crater in Arizona. Today, all moissanite used in engagement rings and fine jewellery is lab-created. Its cosmic origin gives it a unique story, a gemstone literally born from the stars. Lab-grown moissanite is ethical, sustainable, durable, and will last a lifetime, making it perfect as a family heirloom or for a meaningful engagement ring.

Lab-Grown Diamonds:

Lab-grown diamonds are created in laboratories using heat and pressure to replicate how natural diamonds form. Some argue that lab-grown diamonds have a smaller environmental impact than mined diamonds. They are fully traceable, ethically sourced, and free from the social or environmental concerns associated with mined diamonds. Lab-grown diamonds offer a classic, timeless look that can also be passed down for generations.

✨ Sparkle and Appearance

Moissanite:

Moissanite has a higher refractive index than diamonds, which produces more pronounced fire and rainbow flashes. Its sparkle is lively, bold, and immediately eye-catching in both sunlight and artificial lighting. Each stone is carefully cut to enhance its brilliance and maximize its visual impact, creating a dynamic and playful sparkle that makes moissanite an exceptional choice for anyone who wants a gemstone that truly draws attention.

Lab-Grown Diamonds

Lab-grown diamonds offer a refined balance of brilliance, the white sparkle that radiates from the stone, and fire, the subtle rainbow flashes that appear as light passes through the facets. Each diamond is precisely cut to maximize light performance, producing a classic and elegant glow that has made diamonds a symbol of timeless beauty for generations. Their sparkle is more restrained than moissanite, appealing to those who value a traditional, elegant shine.

πŸ’Ž Hardness and Durability

Moissanite

Moissanite ranks at 9.25 on the Mohs scale, making it extremely hard, scratch-resistant, and suitable for everyday wear. Its exceptional durability means it will last a lifetime, allowing it to be passed down as an heirloom without losing its sparkle or integrity.

Lab-Grown Diamonds

Diamonds are the hardest mineral on Earth, rated 10 on the Mohs scale, and lab-grown diamonds retain this same natural hardness. They are perfect for daily wear and will last a lifetime, making them a reliable choice for an engagement ring that can be cherished for generations.

🌈 Colour and Clarity

Moissanite

Moissanite is typically near-colourless, and advanced lab cutting techniques ensure each stone is designed to maximize brilliance and fire. This results in a gemstone that looks vivid, striking, and radiant from every angle. Its clarity and cut are crafted to create a gemstone with a strong visual impact, perfect for those who want a dramatic and eye-catching engagement ring.

Lab-Grown Diamonds

Lab-grown diamonds are graded for colour from D to Z and clarity from flawless to included. This allows buyers to select the exact balance of rarity, beauty, and budget. Modern cutting techniques ensure maximum brilliance while maintaining a natural appearance, producing the classic diamond look that has been cherished for centuries.

πŸ’° Price and Value

Moissanite

Moissanite offers exceptional value for size and quality, typically less expensive than comparable lab-diamonds. This allows buyers to choose a larger stone or a more elaborate design without stretching their budget. Its combination of affordability, durability, and sparkle makes it a compelling alternative for those seeking an ethical, high-impact stone.

Lab-Grown Diamonds

Lab-grown diamonds are generally more expensive than moissanite, but still more affordable than mined diamonds. Many assume diamonds retain value over time, but resale often decreases due to high retail markups. Diamonds should be valued for their beauty, meaning, and craftsmanship rather than as an investment.

🌱 Ethics and Sustainability

Moissanite

All moissanite used in jewellery is lab-created, making it an ethical and sustainable choice. Its cosmic story adds to its allure, while modern creation techniques ensure full traceability. Moissanite represents a conscious choice for ethical engagement rings without sacrificing beauty or durability.

Lab-Grown Diamonds

Lab-grown diamonds are created in controlled environments with minimal social or ethical concerns. Some argue they have a smaller environmental impact than mined diamonds. Choosing a lab-grown diamond ensures a beautiful, traditional engagement ring that supports sustainable and traceable practices.

Which Feels Right for You?

Both moissanite and lab-grown diamonds are durable, ethical, and beautiful. The difference lies in their appearance, personality, and price.

Moissanite: Bold sparkle, distinctive character, and a larger look for your budget. Will last a lifetime and can be passed down through generations.

Lab-Grown Diamond: Traditional diamond appearance with timeless elegance, responsibly created in a lab.

Both are excellent choices for engagement rings, with no better option β€” only the stone that feels right for your story.

Comparison Summary

To help you compare the key characteristics of the gemstones at a glance, here is summary.

Moissanite Lab-Grown Diamonds
Origin Lab-created, meteor crater origin Lab-created, identical to mined diamonds
Chemical Composition Silicon carbide (SiC) Pure carbon
Sparkle Extra fire, rainbow flashes Classic brilliance with subtle fire
Durability 9.25 Mohs, very durable 10 Mohs, extremely scratch-resistant
Colour and Clarity Near-colourless, cut to maximize brilliance Colour D-Z, graded flawless to included
Price and Value Affordable, great value for size and quality Premium, resale may decrease
Ethics 100% ethical, lab-grown Fully traceable, no mining

Now that you've explored the various aspects of gemstones in our comparison guide, we hope you feel more confident in choosing the perfect gemstone for your special piece of jewellery.

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