How to Tell Moissanite vs Diamond: A Comprehensive Guide

In the world of fine jewelry, moissanite has emerged as a brilliant alternative to traditional diamonds, offering stunning sparkle at a fraction of the cost. But how do you distinguish moissanite from diamonds or lab-grown options? At Revarado Jewelry, we specialize in exquisite moissanite pieces that combine affordability with ethical sourcing. Whether you're eyeing our elegant moissanite earrings or a custom ring, understanding these gemstones is key to making an informed choice. In this guide, we'll explore the differences using expert insights, tables, and practical tips to help you navigate your options.

What is Moissanite vs Diamond?

Moissanite and diamonds may look similar at first glance, but they differ fundamentally in composition, origin, and performance. Moissanite, discovered in 1893 by Henri Moissan in a meteor crater, is primarily lab-created from silicon carbide (SiC). Diamonds, on the other hand, are pure carbon formed deep in the Earth's mantle over billions of years.

The key appeal of moissanite is its exceptional brilliance. With a higher refractive index (2.65–2.69) than diamond (2.42), moissanite produces more "fire"—those rainbow-colored flashes that make it stand out. Diamonds offer a classic white sparkle, which many prefer for its timeless elegance. Ethically, moissanite is always lab-grown, avoiding mining's environmental impact, while diamonds can be natural or lab-created.

Based on 2025 market data, moissanite remains significantly more affordable. Here's a quick comparison table:

Our moissanite collections highlight this fiery sparkle, perfect for those seeking bold, affordable luxury.

How to Tell Moissanite vs Diamond

Distinguishing moissanite from diamond isn't always straightforward, but several tests and visual cues can help. Start with a diamond tester: Basic models measure thermal conductivity, and moissanite often passes because its heat dispersion is similar to diamond's. However, advanced testers check electrical conductivity—diamonds conduct electricity (due to their carbon structure), while moissanite does not, making it easy to identify.

Visually, examine under magnification. Moissanite exhibits double refraction, splitting light rays and creating doubled facet edges, unlike diamond's single refraction. In natural light, moissanite's dispersion (0.104) produces more colorful fire than diamond's (0.044). Weight is another clue: Moissanite is about 15% lighter than a diamond of the same size.

Pro tip: Use a loupe or UV light—moissanite may glow differently. For certainty, consult a gemologist or get a GIA certification. Our experts can demonstrate these differences in person.

What is Moissanite vs Lab Grown Diamond?

Lab-grown diamonds are chemically identical to natural diamonds (pure carbon), created using high-pressure, high-temperature (HPHT) or chemical vapor deposition (CVD) methods. Moissanite, however, is silicon carbide and always lab-created (natural moissanite is extremely rare and not used in jewelry).

While both are ethical and sustainable, lab-grown diamonds match natural diamonds in hardness (10 on Mohs scale) and subtle brilliance, making them a premium choice. Moissanite scores 9.25 for hardness—still durable for daily wear—but shines with more vibrant fire. Price-wise, moissanite is significantly cheaper, allowing for larger stones on a budget. In 2025, average prices show moissanite at \(400–\)600 per carat, versus \(600–\)2,000 for lab-grown diamonds.

Comparison table:

Explore our moissanite range for pieces that rival lab-grown diamonds in beauty but excel in value.

What is Synthetic Moissanite vs Moissanite?

All moissanite used in jewelry is synthetic—created in labs to produce large, clear crystals. Natural moissanite exists as tiny, rare crystals in meteorites or geological formations, but it's too small and impure for gem use. Synthetic moissanite replicates the natural mineral's structure but enhances its quality, making it colorless and flawless.

There's no real difference in terminology: "Synthetic moissanite" simply emphasizes its lab origin, while "moissanite" generally refers to the gemstone form. Both offer the same benefits—durability, brilliance, and ethics. We use premium synthetic moissanite for our collections, ensuring top-notch sparkle without the rarity myth.

What is Moissanite vs Lab Diamond?

"Lab diamond" is another term for lab-grown diamond, so this comparison mirrors the previous one. Moissanite isn't a diamond—it's a distinct gem with superior fire but slightly lower hardness. Lab diamonds are real diamonds, just grown in weeks rather than eons, offering identical properties to mined ones at lower costs.

If you prioritize traditional diamond prestige with sustainability, choose lab diamonds. For maximum sparkle and savings, moissanite wins. Our experts recommend trying both in person—our moissanite pieces often surprise with their vivid allure.

How to Tell Diamond vs Moissanite

To differentiate, combine tests: Use a multi-tester for conductivity, check for double refraction under 10x magnification, and observe sparkle patterns. Diamonds return more white light; moissanite shows rainbow effects. Professional certification is foolproof.

We embrace moissanite's unique qualities. Our collection showcases this gem's fire in stunning designs, perfect for everyday elegance or special occasions.

In conclusion, moissanite offers incredible value, ethical appeal, and unmatched sparkle, making it a smart choice over diamonds for many. Whether you're drawn to its fire or affordability, Revarado Jewelry has the perfect piece to elevate your style. Visit us today to discover why moissanite is revolutionizing jewelry.