Acceptance & Submission Guidelines Diamonds

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1 Acceptance & Submission Guidelines Diamonds

Because potential buyers come to Catawiki looking for special and rare diamonds, our in-house experts select every piece for our

2 Diamonds Premium Positioning At Catawiki we auction diamonds of premium quality which are hard to find and appealing to passionate diamond enthusiasts and collectors. Because potential buyers come to Catawiki looking for special and rare diamonds, our in-house experts select every piece for our auctions, ensuring they are of premium quality and are presented in the best possible way. We do this because we aim to keep our bidders excited, allowing them to find the pieces they re interested in and ensure our sellers have great selling experiences.

3 At Catawiki, we move constantly forward. Our positioning is evolving to a strong premium segment which opens more opportunities for success for us and for you. From the 14 million visitors that come to our platform every month, we gain valuable information on what they are passionate about and what they prefer to buy. With your help, we want to make sure we continuously meet this demand and offer the special objects that our growing number of bidders are excited about and want to buy. In these guidelines, we ve defined what the special pieces are that bidders look for in our diamond auctions. We ll also state what we require from you to successfully place them in auction. These guidelines serve to create a level playing field between all our sellers. We will be happy to make room in our auctions for your lots that meet this high quality demand, and we will aim to shape ourselves to better fit you. Our experts and account managers will be fully supporting and guiding you for success on Catawiki. Thank you for being with us on this exciting journey!

certificate, of valuable appearance and suitable for jewellery mounting diamonds of all clarities, except diamonds with inclusions causing opaqueness (for other exceptions see the

4 For our auctions we seek and select: Product Guidelines At Catawiki we auction diamonds gathered from all corners of the world. cut diamonds as well as rough diamonds that are of quality, in all colour ranges except opaque in the case of rough diamonds, diamonds that are always accompanied by a gemological certificate, of valuable appearance and suitable for jewellery mounting diamonds of all clarities, except diamonds with inclusions causing opaqueness (for other exceptions see the Clarity Table), of decent condition and that have a sufficient quality in cut and clarity to be mounted in jewellery diamonds that are accompanied by a trusted gemmological certificate lots that have a with a minimum estimated value of 75

5 Certified natural diamonds of premium quality For our diamond auctions, we seek a wide range of natural diamonds that are accompanied by a trusted gemmological certificate (see details on further on). This includes: White diamonds: Colour treated diamonds: Natural fancy colour (NFC) diamonds: Clarity enhanced diamonds:

suitable are as follows: This includes cuts such as: Brilliant cut

6 Diamond cuts For our dedicated diamond auctions, we select cut diamonds that ready to be mounted in jewellery: Cuts that are not suitable are as follows: This includes cuts such as: Brilliant cut 8/8 single cut Fancy cut Swiss cut Laser cut Damaged and broken cuts Old cut

Colour condition For this auction, we accept

more specific terms, belong in a certain

This means that the items suitable for this

fancy Colour treated (CT) irradiated/hpht CT

7 Colour condition For this auction, we accept diamonds that are of a suitable colour or in more specific terms, belong in a certain colour range. This means that the items suitable for this auction are as follows: White D to Z Natural fancy Colour treated (CT) irradiated/hpht CT black(ish) (opaque) Suitable D colour Suitable F colour Suitable SuitableHTHP M color treatment Although we find a wide range of colours suitable, the following is not suitable for our auctions: Colour coated Suitable fancy colour Suitable fancy colour Suitable treated item

Clarity conditions For this auction, we accept diamonds that are of suitable clarity or in more specific terms, belong in a certain clarity range.

terms of clarity, there are certain ranges that do not live up to our standards and these are as follows: Laser drilled clarity grade IF to SI1 AIG (IL) clarity

8 Clarity conditions For this auction, we accept diamonds that are of suitable clarity or in more specific terms, belong in a certain clarity range. This means that the items suitable for this auction are as follows: FL to I3 AIG (IL) clarity grade IF to SI2 Fracture filled (CE) clarity grade IF to SI1 In terms of clarity, there are certain ranges that do not live up to our standards and these are as follows: Laser drilled clarity grade IF to SI1 AIG (IL) clarity grade I 1/2/3 Fracture filled (clarity treatment) (CE) clarity grade SI2, I 1/2/3 Laser drilled (clarity treatment) clarity grade SI2, I 1/2/3 Heavy inclusions causing opaqueness

Accepted standard treatments The following standard treatments are accepted for our selected diamonds: Irradiation treatment, which leads to a variety of coloured diamonds (for example: yellow,

9 Accepted standard treatments The following standard treatments are accepted for our selected diamonds: Irradiation treatment, which leads to a variety of coloured diamonds (for example: yellow, orange, pink) HPHT (high-pressure, high-temperature) treatment Fracture filled (CE) with clarity grade ranging from FL to SI1 Laser drilled with clarity grade raging from FL to SI1 Irradiation treatment The following standard treatments are not suitable for our selected diamonds: Colour coated treatment Fracture filled with clarity grade SI2, I 1/2/3 Laser drilled with clarity grade SI2, I 1/2/3 Colour coated HPHT treatment

10 Condition For our auctions, we accept diamonds that are natural, undamaged and have a decent clarity. This means that the items submitted: may present small damage, but the seller needs to declare these damages and there should be a possibility of repair through recutting or repolishing Submissions with damages that would lead to them breaking during the setting procedure are not suitable Damaged diamonds for our auctions. The expert reserves the right to reject a submission if the scratches/damages surpass a level and the value of the diamond is affected.

Authenticity / Certification Requirements Buyers are more likely to bid on your lot if they know it s certified as being authentic.

In order to help you have a better understanding of the level of certification required for our diamond auctions, we present the

com/en International Gemological Institute: http://www.igi.org/ The International Institute of Diamond Grading and Research: https://www.

11 Authenticity / Certification Requirements Buyers are more likely to bid on your lot if they know it s certified as being authentic. This is why we always ask to see certificates from trusted gemmological institutes for all our submissions. In order to help you have a better understanding of the level of certification required for our diamond auctions, we present the following list of accepted institutes: Gemological Institute Of America: HRD Antwerp: International Gemological Institute: The International Institute of Diamond Grading and Research: Instituto Gemológico Español: / Antwerp International Gemological Laboratories: Istituto Gemmologico Italiano:

Examples of trusted authentication certificates These following certificates are generally considered to carry sufficient details to be trusted by our experts: GIA HRD IGI AIG (B) IGE IGI Milano

12 Examples of trusted authentication certificates These following certificates are generally considered to carry sufficient details to be trusted by our experts: GIA HRD IGI AIG (B) IGE IGI Milano IIDGR (De Beers) AIG (IL) only for clarity grade FL to SI Please be aware that we do not consider the following certificates to be suitable: IGL AnchorCert DGI CISGEM IJGC EGL (B) GIL EGL (US) NEL CGL On the off-chance our experts consider the certificate to be overrated, the submission might need further clarification from the seller.

To help encourage potential buyers to bid on your lot, you should include a detailed

13 Lot Description Submission Guidelines Potential buyers are more likely to bid on lots with a good description, all relevant information displayed clearly and, of course, beautiful photos. To help encourage potential buyers to bid on your lot, you should include a detailed description of your object(s). This should be thorough and honest, and follow the guidelines on the next page.

Submission guidelines If you are using our website to upload your lots, tips will appear to give you guidance about what information we need to know about your lot.

The required information includes: Diamond weight (in carat) Cut Colour (please mention treatment if applicable) Clarity (please mention treatment if applicable) Treatment Certificate (number

14 Submission guidelines If you are using our website to upload your lots, tips will appear to give you guidance about what information we need to know about your lot. The fields that you fill in help to present the information in a way that s easy for the buyer to read. The required information includes: Diamond weight (in carat) Cut Colour (please mention treatment if applicable) Clarity (please mention treatment if applicable) Treatment Certificate (number certificate, date and place) Sealed in blister if applicable - laser inscribed if applicable Additional description: all detailed and relevant information about the diamond, shipping, tax etc. When adding extra details, please mention any additional cost or additional steps that the buyer might come across when purchasing your item.

Photographs Submission Guidelines Including

bidders do not get a chance to see your lot in

to get the right impression of an item, we

15 Photographs Submission Guidelines Including strong photographs is key to catching buyers eyes, ensuring they bid on your lot. Of course, buying online means potential bidders do not get a chance to see your lot in person, therefore detailed and high quality photographs are very important. To allow our experts, as well as our bidders, to get the right impression of an item, we require: a 360 degree view of the item clearly readable image(s) of the certification report

16 Image guidelines Photograph the diamond in front of a plain and neutral background, preferably a white wall. Photos should show nothing else but the diamond(s) you want to put up for auction and the paper certificate in its own picture. Make sure you avoid any distracting background, only the loose diamond, the sealed or the paper certificate are allowed in the picture. All images must be original photographs taken by the seller, stock pictures, other seller pictures and screenshots are not suitable. Images in which the object is held by a person are not appropriate. Bidders are interested in seeing as many details as possible. Therefore, please always include images of the top and back of the blister in sealed diamonds and the crown, girdle and pavilion in loose diamonds. If you have several items in one lot, please photograph the all offered items together as well as every item separately. All submissions require a photograph of the paper certificate. Provide sharp, specific images of details, such as inclusions. Unenhanced images are preferred.

17 Image guidelines - examples

18 Thank you

Acceptance & Submission Guidelines MINERALS AND METEORITES

Acceptance & Submission Guidelines MINERALS AND METEORITES Minerals and Meteorites Premium Positioning Authenticity - Quality - Legal Compliance At Catawiki we auction minerals and meteorites of premium