Two of the most beautiful stones you can wear today are often confused for one another — yet they are fundamentally different gems. At GemHub, our Gurugram atelier sets both every day, so here is the honest, unhurried comparison, with nothing sold short.
Quick answer
A lab-grown diamond is a real diamond — pure crystallised carbon, chemically and optically identical to a mined diamond, and graded on the same 4Cs by laboratories such as IGI. A moissanite is a different gem entirely: silicon carbide, prized for its extraordinary fire, and certified by GRA. Lab-grown diamonds offer classic diamond brilliance and the hardness of a true diamond (Mohs 10); moissanite offers more rainbow sparkle at roughly one-tenth of the price (Mohs 9.25). Choose a lab-grown diamond if you want an authentic diamond at an ethical price; choose moissanite if maximum sparkle-per-rupee matters most.
What is a lab-grown diamond?
A lab-grown diamond is a genuine diamond created in a laboratory rather than in the earth. It is made of pure carbon in the same crystal structure as a mined diamond, grown over weeks using either High-Pressure High-Temperature (HPHT) or Chemical Vapour Deposition (CVD) methods. Because it is chemically, physically and optically identical to a natural diamond, it is graded on the same four criteria — Cut, Colour, Clarity and Carat — and, at GemHub, is independently certified by the International Gemological Institute (IGI). A jeweller cannot tell it apart from a mined diamond by eye; only specialised equipment can.
What is moissanite?
Moissanite is a distinct gemstone made of silicon carbide, first discovered in a meteorite crater and now grown in laboratories for jewellery. It is not a diamond and is not a fake diamond — it is its own brilliant gem, celebrated for a fiery, colourful sparkle that exceeds a diamond’s. Modern moissanite is near-colourless and exceptionally hard, and at GemHub every moissanite is GRA-certified. Because it is more affordable than a diamond of the same size, it lets you wear a larger, more dramatic stone within a smaller budget.
Lab-grown diamond vs moissanite: side-by-side comparison
| Attribute | Lab-Grown Diamond | Moissanite |
|---|---|---|
| Composition | Pure carbon (a real diamond) | Silicon carbide |
| Is it a diamond? | Yes — identical to natural | No — a separate gem |
| Hardness (Mohs) | 10 (hardest known material) | 9.25 (extremely durable) |
| Sparkle | Classic white brilliance | More fire / rainbow flashes |
| Colour | Graded D–Z; GemHub sets DEF–GH | Near-colourless |
| Certification | IGI | GRA |
| Relative price (same size) | Higher — a true diamond | ~10–20% of a lab diamond |
| Best for | An authentic diamond, forever | Maximum sparkle on a budget |
Do lab-grown diamonds and moissanite sparkle the same?
No — they sparkle differently, and the difference is visible in bright light. A diamond (natural or lab-grown) returns light as crisp white brilliance with subtle flashes of colour, the look most people picture as a diamond. Moissanite has higher dispersion, so it throws more intense rainbow fire, especially in larger sizes and under sunlight. Neither is better — it is a matter of taste. If you want the timeless, understated diamond look, choose a lab-grown diamond; if you love a lively, colourful flash, moissanite delights.
Is moissanite a real diamond? Will it pass a diamond tester?
Moissanite is not a real diamond — it is silicon carbide, a different mineral. It can, however, register as diamond on older thermal diamond testers because it conducts heat similarly; modern combination testers that also measure electrical conductivity correctly distinguish the two. This is why certification matters: a GRA certificate confirms a stone is genuine moissanite, and an IGI certificate confirms a genuine lab-grown diamond, so you always know exactly what you are wearing.
How much do they cost in India?
Moissanite is dramatically more affordable than a diamond of the same size, while a lab-grown diamond costs far less than a mined diamond of equal quality. As an indicative guide for a well-cut, near-colourless 1-carat-size centre stone (stone only, before the setting):
- Lab-grown diamond (1 carat, IGI-certified): typically ₹40,000–₹1,00,000+, depending on the 4Cs.
- Moissanite (1 carat / 6.5 mm, GRA-certified): typically ₹6,000–₹18,000, depending on cut and grade.
- Natural diamond (1 carat), for context: commonly ₹3,00,000–₹6,00,000+.
Prices vary with quality, metal and design; the figures above are indicative for 2026 and are confirmed on each GemHub product page. The takeaway: a lab-grown diamond gives you a real diamond at a fraction of the mined price, while moissanite stretches a budget furthest of all.
Which should you choose?
Choose a lab-grown diamond if you want an authentic, forever diamond — for an engagement ring, a milestone gift, or an heirloom you intend to keep — with real-diamond hardness and IGI certification, at an ethical, sustainable price. Choose moissanite if your priority is the biggest, most brilliant look for the smallest outlay, for fashion pieces, everyday sparkle, or a bold statement without a diamond budget. Many of our clients own both: a lab-grown diamond solitaire for the promise, and moissanite pieces for everyday brilliance.
Are both ethical and sustainable?
Yes. Both lab-grown diamonds and moissanite are created in laboratories rather than mined, so neither involves the environmental disruption or sourcing concerns associated with mining. Both are excellent conflict-free, sustainable choices, which is a large part of why modern couples in Delhi NCR are choosing them. At GemHub we pair this with full certification transparency — IGI for every diamond, GRA for every moissanite — so ethics and authenticity are never taken on trust alone.
See both in person at our Gurugram experience store
The surest way to feel the difference between a lab-grown diamond’s white brilliance and moissanite’s fire is to see them side by side. You are warmly invited to our Gurugram experience store, where our atelier team will show you certified pieces in both stones under natural and gallery light, with no obligation. Prefer to browse first? Explore our lab-grown diamond collection or our engagement rings.
Frequently asked questions
Is a lab-grown diamond a real diamond?
Yes. A lab-grown diamond is pure crystallised carbon with the same chemical, physical and optical properties as a mined diamond. It is graded on the same 4Cs and, at GemHub, certified by IGI. Only laboratory equipment can distinguish it from a natural diamond.
Is moissanite better than a lab-grown diamond?
Neither is universally better — they suit different priorities. Moissanite offers more fire and costs far less, making it ideal for maximum sparkle on a budget. A lab-grown diamond is a genuine diamond with greater hardness (Mohs 10) and classic brilliance, ideal for an authentic, lasting piece.
Will moissanite pass a diamond tester?
Moissanite can pass an older thermal-only diamond tester because it conducts heat like a diamond, but a modern tester that also checks electrical conductivity identifies it correctly as moissanite. A GRA certificate confirms it is genuine moissanite.
Which is cheaper, moissanite or lab-grown diamond?
Moissanite is significantly cheaper — often around 10–20% of the price of a lab-grown diamond of the same size — because it is a different gem (silicon carbide). A lab-grown diamond, in turn, costs far less than a mined diamond of equal quality.
Do lab-grown diamonds hold value?
Lab-grown diamonds are valued for their beauty, authenticity and ethics rather than as a financial investment, much like fine jewellery in general. Their appeal is getting a real, IGI-certified diamond at an accessible price — not resale return.
Are lab-grown diamonds and moissanite ethical?
Yes. Both are created in laboratories rather than mined, making them sustainable, conflict-free choices. GemHub certifies every lab-grown diamond with IGI and every moissanite with GRA for full transparency.
Every GemHub lab-grown diamond is IGI-certified and every moissanite is GRA-certified. Explore the lab-grown diamond collection and engagement rings, or visit our Gurugram experience store.
