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  • How are cultivated diamonds made?

    Cultivated diamonds are grown from tiny carbon seeds of pre-existing diamonds. Advanced technology – either extreme pressure and heat (HPHT) or a special deposition process (CVD) – mimics the natural method of diamond formation.

  • What’s the difference between cultivated diamonds and moissanite or other diamond stimulants?

    Diamond stimulants, such as moissanite and cubic zirconia, look similar to diamonds but are not true carbon crystals.

  • Can you tell the difference between cultivated diamonds and naturally mined diamonds?

    No, cultivated diamonds consist of actual carbon atoms arranged in the characteristic diamond crystal structure. Since they are made from natural diamonds, they exhibit the same chemical and optical properties.

  • Does my diamond come with a certificate?

    Yes, all our diamonds come with certification by GIA or IGI.

  • What are the 4 C’s?

    Carat weight measures the weight of the stone. A metric carat is defined as 200 milligrams. Each carat is subdivided into 100 points. This allows very precise measurement to the hundredth decimal place. For example, a diamond that weighs 0.9 carats has ninety points. All else being equal, diamond price increases with carat weight because larger diamonds are rarer. However, two diamonds of equal carat weight can have very different values depending on three other factors of the 4C’s: Cut, Colour and Clarity.

    Cut refers to how well a diamond’s facets interact with light based on how the stone was polished to reflect the most light and brilliance. Ideal is the best cut because it meets exact proportions to reflect the most light. Only Round Brilliants can be graded as Ideal because their proportions have been perfected by empirical and mathematical data, and they have the strictest cut standards out of all the shapes. All diamond cuts have five grades: Excellent, Very Good, Good, Fair, and Poor.

    Colours of diamonds range from D to Z. Colourless diamonds are stones that don’t have visible yellowish tints. Such diamonds are put in the Colourless grading range and are assigned a letter of D (the highest), E or F. The next best grading range is called Near Colourless (G, H, I or J). Diamonds graded from K to Z have yellowish tints and are not considered colourless.

    Clarity refers to a diamond’s inclusions and blemishes, which are very slight imperfections in the diamond’s interior that are nearly invisible to the naked eye. Diamonds that are VS2+ will be eye-clean, with imperfections only visible under 10x magnification. There are 6 categories, some of which are divided, for a total of 11 specific grades.

    Flawless (FL) No inclusions and blemishes under 10x magnification
    Internally Flawless (IF) No inclusions under 10x magnification
    Very, Very Slightly Included (VVS1 and VVS2) Inclusions so slight they are difficult for a skilled grader to see under 10x magnification
    Very Slightly Included (VS1 and VS2) Inclusions observed with effort under 10x magnification, characterised as minor
    Slightly Included (SI1 and SI2) Inclusions noticeable under 10x magnification
    Included (I1, I2 and I3) Inclusions are obvious under 10x magnification which may affect transparency and brilliance

  • Where do you ship to?

    M Nassar ships to the UK, Europe, the US and internationally.

  • Where do orders ship from?

    All orders are shipped from London via DHL.

  • How much does shipping cost?

    Shipping varies depending on the country being shipped to.

  • How are duties and taxes handled?

    If your order is shipping to the UK, we include all duties and taxes in the final price, so you won’t have to pay for anything separately upon arrival.
    If you’re ordering to another country, our shipping partner will contact you directly to clear any taxes or duties prior to delivery .

  • When will my order arrive?

    All our jewellery is made to order. It takes us 4 weeks to make most pieces. Once we’ve handed your order over to our shipping partner, it will take one or two working days to be delivered within the UK and five to seven days internationally. If you require an item more urgently, contact us and we’ll do our best to speed up the process.

  • Does my order require a signature upon delivery?

    Yes, we require a signature to ensure your jewellery arrives safely.

  • What is your return policy?

    We are happy to accept returns of unworn, unmarked in-stock earrings within 14 days of receipt. Unfortunately, we cannot accept returns of engagement rings, eternity bands, or any bespoke customised pieces.

  • Are returns free?

    As long as your M Nassar jewellery is returned to us in its original condition, we will refund the full amount minus the cost of shipping both ways.

  • How do I return an item?

    Contact us and we will provide a prepaid shipping label with return instructions.

  • Can I return a bespoke/customised item?

    Because bespoke jewellery pieces are made just for you, we do not offer refunds unless it is faulty.

  • When will I receive my refund?

    It can take up to 7-10 business days for us to process your return. Once we have received and processed your return, we’ll be in touch to let you know your refund is on its way.

  • How should I clean my M Nassar jewellery?

    Fill a bowl with 2 cups of warm water and several drops of mild dish detergent. Soak your diamond jewellery in the solution for 15 minutes. Scrub the diamond with a soft toothbrush then rinse it with water and let it dry.

  • What should I do if my jewellery breaks?

    We can help you get it fixed. Contact us for more details.

  • Will my jewellery fade or wear away?

    No, because we only use platinum or 18K/14K gold only. At M Nassar, we use solid gold and platinum to provide our clients with high quality pieces of jewellery that can last a lifetime and be passed onto generations.