Free guides · plain English · written by Yash Chandpara

Made to order · Free insured delivery Australia-wide over A$500

IGI & GRA certified · Lifetime warranty

Education›Moissanite Guidance›Moissanite vs Lab Grown Diamonds

Moissanite GuidanceFenora Guide11 min read

Moissanite vs lab grown diamonds.

The most important comparison for buyers considering both options. Moissanite and lab grown diamonds are genuinely different materials with genuinely different properties, different price points and different buyer profiles. This guide covers every dimension of the comparison honestly.

The fundamental difference — different materials

Moissanite and lab grown diamond are not the same material. Moissanite is silicon carbide (SiC). Lab grown diamond is pure carbon (C) — the same material as mined diamond, grown in a laboratory. These are different chemicals with different crystal structures and different physical and optical properties.

This distinction matters because the comparison is not "which is more real" — both are real materials with genuine properties. The comparison is about which material is right for a specific buyer based on their priorities: optical character, budget, material identity, durability and long-term considerations.

“The comparison between moissanite and lab grown diamond is not about which is better. It is about which is right for a specific person with specific priorities. I help buyers find the answer to that question.”
— Yash Chandpara, Founder

The complete comparison — every dimension

A systematic comparison across every dimension that matters to an engagement ring buyer.

Dimension	Moissanite	Lab Grown Diamond	Verdict
Material	Silicon carbide (SiC)	Pure carbon (C)	Different materials — not comparable on quality grounds
Mohs hardness	9.25	10	Both excellent for daily wear. Marginal practical difference
Refractive index (brilliance)	2.65–2.69	2.417–2.419	Moissanite has higher light return
Fire (colour dispersion)	0.104	0.044	Moissanite has ~2.4x more fire than diamond
Double refraction	Yes — visible under loupe	No	Diamond has no double refraction
IGI certification	No — not certified by IGI	Yes — every Fenora diamond is IGI certified	Lab grown diamond has independent quality certification
Price at 1ct visual size	~$200–400	~$1,500–2,500	Moissanite ~90% less expensive
Visual appearance in diffuse light	Very similar to diamond — most people cannot distinguish	Diamond	Very similar in normal lighting
Visual appearance in strong light	More colourful fire than diamond — distinctly more rainbow	Diamond — subtler fire	Noticeable difference in strong light
Resale value	Very low	Low but higher than moissanite	Neither is a good investment
What it is	A genuine gemstone — silicon carbide	A diamond — real diamond, lab grown	Different things: both genuine materials

The price difference — 90% vs 0% cheaper than mined

Moissanite is approximately 90–95% less expensive than a lab grown diamond of equivalent visible size. A lab grown diamond is 60–80% less expensive than a mined diamond of equivalent quality.

Visible Size	Mined Diamond	Lab Grown Diamond	Moissanite
6.5mm (~1ct visual)	$4,000–8,000+	$1,500–2,500	$200–350
7.5mm (~1.5ct visual)	$8,000–18,000+	$2,500–4,000	$300–500
8.0mm (~2ct visual)	$15,000–35,000+	$4,000–7,000	$400–700
9.0mm (~2.5ct visual)	$25,000–50,000+	$7,000–12,000	$500–900

What the price difference means in practice

For a buyer with a $500–800 budget for the stone, moissanite can provide a large, optically impressive 2–2.5ct equivalent stone. Lab grown diamond at this budget buys approximately 0.3–0.4ct
For a buyer with a $2,000–3,000 budget, lab grown diamond provides a 1.0–1.5ct Excellent-cut IGI-certified diamond. Moissanite at this budget provides multiple large stones or a very large single stone
The right choice depends entirely on what the buyer values more: diamond (the material) or size (the visual impact per dollar)

The optical difference — what you actually see

The most practically important question for most buyers is: what does each look like in a ring? The answer depends on the lighting condition.

In diffuse indoor light — most home and office environments

Moissanite and lab grown diamond look very similar. Both appear as brilliant, sparkly white stones. The fire difference is present but subtle. Most people cannot distinguish the two in this light
This is the lighting condition in which rings are most often viewed — the light of daily life

In strong directional light and direct sunlight

The fire difference becomes clearly visible. Moissanite produces vivid, prominent rainbow colour flashes. Lab grown diamond produces more subtle colour dispersion
A person who knows what to look for can identify moissanite by its fire in strong light
Many moissanite owners love this characteristic — others prefer the more restrained sparkle of diamond

Which is right for you? — The decision framework

Based on thousands of consultations, these are the buyer profiles that suit each option.

Moissanite is likely the right choice when

Budget is the primary constraint and visual size matters — moissanite provides the most visible gemstone per dollar
The buyer is comfortable with the optical difference (higher fire) and values it
The recipient knows and is happy with moissanite — this should not be a surprise if the recipient cares about the material
Maximum visual impact at minimum cost is the brief

Lab grown diamond is likely the right choice when

Material matters — the buyer or recipient specifically values having a diamond, regardless of how it was grown
Independent quality certification (IGI) is important — lab grown diamond comes with a certificate that establishes the quality independently
A more subtle, diamond-like sparkle character is preferred over the high fire of moissanite
The budget allows it — even a smaller lab grown diamond may be preferred by the recipient over a larger moissanite

“The honest advice I give every buyer is this: if in doubt about whether the recipient would prefer diamond or moissanite, choose lab grown diamond. The choice of moissanite should be made with confidence that it is the right material for the specific person.”

Comparison questions — answered

Every question about the moissanite vs lab grown diamond comparison.

Is moissanite better than lab grown diamond?

Neither is objectively better — they are different materials for different buyers. Moissanite is better value per dollar for maximum visual size. Lab grown diamond is better if having a diamond is important. The right choice depends on specific priorities.

Can lab grown diamond and moissanite be used in the same ring?

Yes. Some popular configurations at Fenora combine a moissanite centre stone with a lab grown diamond halo, or use lab grown diamond pavé on the band alongside a moissanite centre. The visual result can be excellent.

Will my fiancee know the difference?

If she is familiar with diamonds, she may notice the higher fire of moissanite in strong light. In normal indoor light, most people cannot distinguish the two. Whether this matters depends on whether the material is important to her — which is worth knowing before the purchase.

Is moissanite a stepping stone before upgrading to diamond?

Some buyers choose moissanite for the engagement ring with the intention of upgrading to diamond later. Fenora offers this path — contact Yash Chandpara to discuss the upgrade programme. Others are completely satisfied with moissanite and never feel the need to upgrade. Both approaches are valid.

Melbourne client care · Made in Surat

Moissanite or lab grown diamond? Ask Yash Chandpara.

Book a free online consultation. Yash Chandpara shows both options on screen and helps you decide which is right for your specific brief and budget.

Book Free Consultation Shop Engagement Rings