Sustainable jewellery by mandana is more than just an accessory. The gold jewellery made with Nevermined diamonds combines luxury with sustainability. Our sustainable jewellery is our contribution to protecting the environment. In the production process, we focus on our values every step of the way: sustainable materials, environmentally friendly production and fair working conditions. Together with our pledge of transparency and quality, the result is exclusive diamond jewellery that’s made for eternity. Our lab-grown diamonds equal naturally grown diamonds in every aspect – carat, colour, purity and cut. So, diamond jewellery from mandana makes a wonderful gift for the planet, as well as you or your loved one. After all, lab-grown diamonds aren’t just more ethical and responsible than many mined diamonds – they’re also much more environmentally friendly. Combined with recycled gold, this makes an unbeatable combination.

Lab-grown diamonds are diamonds grown in a laboratory. While diamonds in nature take a billion years to occur, lab-grown diamonds only take a few weeks. The diamonds are grown to the desired size using a variety of methods in a controlled environment.

If you’d like to learn more about lab-grown diamonds, we’ve put together a few facts for you in our article: The lowdown on lab-grown diamonds by mandana.

Yes, lab-grown diamonds are visually, chemically and physically identical to mined diamonds. Distinguishing between ‘real’ and ‘false’ diamonds here is inaccurate, as both have the same properties. 

If you’d like to learn more about lab-grown diamonds, we’ve put together a few facts for you in our article: The lowdown on lab-grown diamonds by mandana.

Two processes are usually used for the production of lab-grown diamonds: the CVD and the HPHT process. Nevermined diamonds are produced exclusively using the CVD process. ‘CVD’ stands for ‘chemical vapour deposition’. In this process, small pieces of diamond known as ‘seeds’, are placed in a vacuum chamber. Plasma is created in this chamber and its gases are decomposed during the process. The carbon released is deposited on the surface of the seeds and thus allows the diamonds to grow gradually. Afterwards, the rough diamonds are processed and cut in exactly the same way as mined diamonds and certified by an institute such as the International Gemological Institute (IGI) or the Gemological Institute of America (GIA). Lab-grown diamonds are also labelled as such in their certificates.

If you’d like to learn more about lab-grown diamonds, we’ve put together a few facts for you in our article: The lowdown on lab-grown diamonds by mandana.

The 4 Cs are criteria that define the quality and value of a cut diamond. Both naturally grown and lab-grown diamonds are assessed against these criteria and receive an appropriate certificate (for example, from GIA or IGI). In addition, the certificate for lab-grown diamonds indicates that the diamond is a grown diamond.

All diamonds are produced by certified partners known to us, as the size of the collections and the number of pieces means we are currently still buying in diamonds. However, we are working towards exclusively using Nevermined diamonds for our jewellery in the near future. We grow these on our premises in Essen, in the heart of the Ruhr Valley region. This allows us to ensure the diamonds do not have to travel thousands of kilometres in transit and are also produced under sustainable conditions.

You will receive a certificate from an official certification organisation, such as the International Gemological Institute (IGI) or the Gemological Institute of America (GIA), for every piece of jewellery with diamonds of 0.5 ct or more from mandana. The certificate confirms the authenticity of the diamond and provides you with further information about its quality (see also What do the 4 Cs refer to?).

The jewellery by mandana is handmade in Germany and Spain with great care and attention to detail. Find out more about mandana and our jewellery here.

Diamond jewellery from mandana is a statement of luxury and sustainability. Our sustainable jewellery is made from recycled 18 carat gold and is available in white, yellow and rose gold. Our diamond jewellery is lovingly handmade in Germany and Spain. Lots of creativity and attention to detail goes into every single piece in our jewellery collections. mandana makes sustainable fine jewellery with sustainably produced diamonds.

Essentially, altering the size of a mandana ring depends on its design. If your ring is too small or too big and you would like to have it altered, please send us a message via the contact form. 

Alternatively, you can return your unworn ring in its original packaging and order it again in the desired size. For more information on the returns process, see Returns and exchanges.

We will also be happy to engrave your mandana jewellery for you. Simply send us an email to customerservice@mandana-jewellery.com. Please note that not all jewellery is suitable for engraving and the cost varies depending on the characters to be engraved. Please also note that once your mandana jewellery has been engraved, we can no longer allow returns.

We set the highest standards for our mandana jewellery in terms of quality and workmanship. However, in the unlikely event of a defect, you shall be entitled to rights in accordance with statutory warranty law, taking into account the agreements made and our GTC.

It is best to take your jewellery off whenever it could come into contact with water, such as when bathing, washing your hands, showering or cleaning. Chemicals such as chlorine in swimming pools can damage your gold jewellery. It's also better to take off your jewellery when you exercise or play sports, because sweat is not good for your favourite pieces either. There is a risk that they will be damaged during exercise, too. This also applies to other activities, such as gardening or DIY. For more tips on how to keep your sustainable diamond jewellery looking great, check out our article X tips for caring for your diamond jewellery.

Of course, you can have your mandana jewellery repaired by us if something breaks. Send us a message via the contact form.

In principle, you can of course have your mandana jewellery engraved by a jeweller at your own expense. Please note that not all jewellery is suitable for engraving and that we cannot accept any liability for any consequences or damage in connect with engraving. Please also note that once your mandana jewellery has been engraved, we can no longer allow returns. 

In the event of a defect or deficiency in your mandana jewellery, we recommend that you contact our customer service first, as we do not assume any costs or other liability for repairs by a jeweller not been agreed with us.

There are different methods to find the correct ring size:

Ruler

If you’ve got a ring that fits already, all you need is a ruler. Use it to measure the inner diameter of the ring. Now all you need to do is take a look at our size table. For instance, if your ring’s inner diameter is 16.2 mm, the size 51 ring is right for you.

Paper or thread

If you don’t have a ring that fits already, you can also use a few household items to measure your ring size, such as paper or thread.

Paper

Cut a long strip of paper around 3 mm wide. Wrap it around the finger where you intend to wear your new ring. Make a small marking with a pencil in the place where the strip overlaps. Now measure the distance from the start of the strip to your marking – and you’ve found the correct ring size!

Thread

If you don’t have any paper to hand, you can use sewing thread, too. Wrap the thread around your finger, mark it where it overlaps and measure from the start of the thread to the marking.

Our sustainable diamond jewellery is made of 750 gold (18 carat). Depending on personal taste, you can also choose from three colour alloys – yellow, white or rose gold: 

• Yellow gold: Yellow gold is the classic gold alloy. Adding copper and silver can help precisely control the colour of the yellow gold alloy. Although this classic colour alloy is the closest to the colour of ‘original gold’, it is used to make the piece of jewellery more resilient. Yellow gold remains the most popular gold alloy used in wedding rings. 
• White gold: To obtain white gold as a colour alloy, silver, platinum or palladium, for example, are added to the gold alloy. This reduces the colour intensity and creates a paler shade. If the white gold alloy contains platinum or palladium, it is more resistant to scratches. A white gold alloy is a great way to highlight the brilliance and purity of diamonds. It’s the ideal setting for the diamond on your finger. 
• Rose gold: Although rose gold was originally used only very rarely in rings, it has been a trend colour for fashion, smartphones, and of course jewellery, for some years now. The reddish shimmer in rose gold alloys is created by adding copper and silver. The more copper is added, the redder the alloy appears, which is why it is often referred to as ‘red gold’. Rose gold flatters every skin type and is a little subtler than bold yellow gold. But a rose gold ring also looks perfect when combined with yellow and white gold counterparts.

Pure gold is a rather soft precious metal, which makes it very easy to shape and process. However, if we used pure gold for jewellery, it would quickly develop unsightly scratches and other damage. To prevent this, other elements, such as silver or palladium, are added to pure gold. There are many different grades, from 333 (8 carat) to 999 gold (24 carat). In Europe, three gold alloys are most commonly used in gold jewellery: 

• 333 gold: 333 gold consists of 33.3% pure gold and corresponds to 8 carats. 8 carat gold therefore has the lowest gold content for gold jewellery. In Germany, this gold alloy is the minimum permitted in the jewellery industry for gold jewellery to be designated as such. 
• 585 gold: In 585 gold, the amount of fine gold is 58.5%. 585 gold is also referred to as 14 carat gold. This gold alloy is the most commonly used alloy for gold rings and other gold jewellery worldwide. 
• 750 gold: 750 gold has the highest proportion of gold of all three alloys, at 75%, amounting to 18 carats. Alongside 585 gold, it is the most commonly used in gold jewellery in Germany. The jewellery from mandana is made exclusively from 750 gold.

To keep your jewellery lovely and shiny, you should regularly give it a bath in soapy water. Fill a small bowl with lukewarm water and add a few drops of washing-up liquid. Put your jewellery in the soapy water for about 15 minutes and then rinse it with lukewarm water. Finally, dry it with a lint-free cloth. For more tips on caring for your diamond jewellery, check out our magazine article.

Your order will usually be shipped within 2-3 working days after receiving your payment. The delivery time with our shipping service provider UPS is usually 1-3 working days within the EU. However, we have no influence on the actual shipping time in individual cases and abroad, as this can vary due to different customs regulations in individual countries.

You can change the delivery or billing address in your customer account at any time. Please note, however, that a change is only valid for subsequent orders. Unfortunately, it is no longer possible to change the delivery or billing address for orders that have already been placed.

You can check the status of your order at any time by logging into your mandana customer account. You can view the status of your current order under ‘Orders’.

At mandana you can pay with PayPal, credit card or Apple Pay.

Shipping is free for orders of €300 or more. For orders under €300, we charge a flat shipping rate of €20 for insured shipping.

Every mandana order is shipped via express delivery with UPS.

Yes, your package will always be sent insured with UPS. For security reasons, the package must also be received and signed for by the person who bought the jewellery from mandana.

If you don't like your mandana jewellery or it doesn't fit, you can of course exchange or return it. To do this, send us a message with your order and/or invoice number using the contact form. Please return the goods to us in the original packaging with the existing labels if possible and note that the items should be in perfect condition.

Once we have received and reviewed your returned order, we will issue a refund for the amount you paid.