Moissanite
Moissanite Resale and Insurance: What It Is Worth
Second-hand moissanite sells for very little. Here is what holds value, how insurers price a claim, and exactly what you need to declare on a policy.
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An independent knowledge base for UK & European shoppers — engagement rings, the 4Cs, moissanite, ring sizes and how to look after jewellery.
Popular guides
The articles our readers return to most.
Moissanite
How to Check a Moissanite Certificate: GRA and IGI
A GRA card is not a grading report. What each document states, what neither of them tells you, and the mis-selling tactics to watch for.
Moissanite
Moissanite and Everyday Wear: Chemicals, Pools and Gyms
Chlorine will not touch the stone but it will ruin the plating. What genuinely damages moissanite, what does not, and how to clean a ring at home.
Moissanite
Best Moissanite Cut for Brilliance: Round, Oval, Radiant or Emerald
Which moissanite cut throws the most light, and which shapes expose body colour. A practical comparison of round, oval, radiant and emerald cuts.
Moissanite
Moissanite Carat vs Millimetre: The Size Guide That Matters
A 1ct moissanite is not one size. Why millimetres decide what you get, with a round brilliant conversion table and the fancy-shape exceptions.
Moissanite
Moissanite Colour Grades: What D, E and F Really Look Like
Moissanite D, E and F grades are not diamond grades. Here is what each band really looks like, where a faint tint shows, and what to check before you buy.
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Featured bridal jewellery
Pieces our readers often read about next — GRA-certified, shipped to the UK & EU.
About this knowledge base
Why we write the way we do.
Gem Knowledge Base is an editorial project built around a simple problem: most jewellery websites either sell to you or overwhelm you with jargon. We publish plain-English guides that assume you know nothing about the 4Cs, UK ring sizes or platinum versus white gold — and want it explained properly, with a European shopper's perspective.
We work with an audited workshop that produces GRA-certified moissanite and laboratory-grown pieces, which is why you'll find a small curated selection of bridal jewellery alongside the articles. Every product page links back to the relevant guide so you can read before you buy.
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GRA certified
Every centre stone ships with a GRA report card.
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UK & EU delivery
Tracked shipping to the United Kingdom and European Union.
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14-day returns
Changed your mind? Standard returns window on all pieces.