# The Certificate

- Link: https://dev.contediamonds.com/en/the-certificate/
- Published: 2026-10-14T18:03:55+00:00
- Author: Enrico Mezzogori

Certificate of Authenticity

# Your Jewelry Certificate

Every piece of jewelry has its own certificate: a unique document with an identification
number and a description of the metal and stones. You receive it on a card with 
an NFC chip: hold it near your phone to open and download it.

How It Works

## One Card, Your Certificate

 1. **Receive the card with your jewelry.** It has an NFC chip, the same technology
    used for contactless payments.
 2. **Hold it near your phone.** Your jewelry's certificate page will open. No app 
    installation is required.
 3. **View and download it.** You can read it on your phone and save it as a PDF.

### Where to Tap the Card

 * **iPhone XS and later.** With the screen on, hold the card near the top of the
   back and tap the notification that appears.
 * **iPhone 7, 8, and X.** Open the Control Center and tap "NFC Tag Reader." If 
   it's not there, add it via Settings > Control Center.
 * **Android.** Search for "NFC" in Settings and enable it, then place the card 
   against the center of the back.
 * **With a case.** A thick or metallic case may shield the chip: if the card won't
   read, remove the case.

An Example

## What a Certificate Looks Like

This is the certificate for an oval ruby and diamond ring. The number, stamp, and
signature here are not real: your jewelry's certificate will contain its specific
details.

![Sample certificate for an oval ruby and diamond ring in 18 kt white gold, featuring
the logo, jewelry photo, and gemstone tables: the entries are transcribed in the
following section](/wp-content/uploads/2026/10/certificato-esempio-cd30126.webp)

[Open the PDF Certificate](https://dev.contediamonds.com/wp-content/uploads/2026/10/certificato-esempio-cd30126.pdf)

PDF, one A4 page, approximately 0.5 MB

The Entries

## What It Reports

The entries are in English and Italian, and vary depending on the jewelry and its
stones. In the sample certificate, they are as follows.

 The Jewelry  |  Number |  XXXXXX not real in the sample |  
 |  Description |  Anello con rubino ovale e diamanti Oval ruby and diamond ring |  
 |  Material |  18 kt white gold oro bianco 18 kt |

 Main Gemstone  |  Gemstone |  Ruby rubino |  
 |  Shape |  Oval ovale |  
 |  Weight |  0.55 ct approximate 0,55 ct circa |  
 |  Color |  Intense Red rosso intenso |  
 |  Cut |  Very Good molto buono |  
 |  Proportions |  Very Good molto buone |  
 |  Symmetry |  Very Good molto buona |

 Secondary Gemstones  |  Gemstone |  Diamonds diamanti |  
 |  Shape |  Round Brilliant tondo brillante |  
 |  Weight |  0.42 ct 0,42 ct |  
 |  Color |  F |  
 |  Clarity |  SI |

At the bottom, a statement regarding the selection of gemstones, the name Conte 
Diamonds S.p.A., the stamp, and the signature.

Need help?

## Card Not Reading?

Try holding it against different spots on the back of your phone, without a case.
If your phone does not have NFC, if the card is not working, or if you have lost
it, please write to us with your order number.

[Contact Us](https://dev.contediamonds.com/contatti/#scrivici)

[Questions About Certificates](https://dev.contediamonds.com/domande-frequenti/#certificati)