Therapeutic properties

How are gemstones designated on jewelry?

A jewelry tag has two main functions: marking и sealing-guarantee. Labeling helps you quickly find out the necessary information, and the very presence of truthful and accurate manufacturer data on the product certificate protects the buyer from counterfeiting. Jewelry tags are made from cardboard, paper or plastic and printed on a special printer. Most often, the jewelry passport has a rectangular shape. The tag is attached to the product using a white thread or fishing line, threading it through the hole on the tag itself or into a metal connecting ring. Also, before sale, a seal is attached as one of the evidence of authenticity. precious item. If the design of the decoration does not make it possible to attach a tag to the product, for example, in C-rings, then it is placed in a bag along with the decoration or attached to individual packaging made of polyethylene or other material. The brand logo may be located on the front side of the tag, and other information may be on the back side. All this data is the responsibility of the manufacturer, and he is responsible to the buyer for its truthfulness.

Characteristics of jewelry according to the knowledge: “The trade label of jewelry manufacturers conveys the visibility of such information: name or trademark of the manufacturer, name of the manufacturer or its code, name of the metal alloy and sample, weight robe, number (size) of heel or bracelet, name of stone ta yogo masa, as well as the badges “virib buv u vzhitku” or “b/v” for jewelry virobіv, which were u vzhitku.”

Jewelry tags have the following details:

  • manufacturer’s name and trademark;
  • legal address of the manufacturer;
  • product name;
  • article;
  • name of metal and sample;
  • weight in grams;
  • precious insert and its characteristics – weight, purity, color;
  • artificial insert and its weight in grams;
  • size or parameters;
  • date of manufacture;
  • seal of the technical control department;
  • manufacturer’s hologram on the front side of the tag;
  • price per product in UAH;
  • inscription “DSTU 3527-97”.

Tags for jewelry must have inserts or metal samples. But the production date, price and hologram are not such an obligatory element on the label. But, for example, a hologram, for many manufacturers, is additional protection against counterfeiting and a “beacon” for the buyer.

The size of a bracelet or chain is written in p.18 format, size: 18 or p=18

How to decipher a gemstone jewelry tag

If the ring, earrings or pendant has an insert, its name and characteristics must also be indicated on the tag. Be sure to indicate the origin and type of insert: precious stone, semi-precious, artificial. If the insert is grown in a laboratory, then the manufacturer writes that the jewelry contains not just a ruby, but a GT ruby, where GT means “hydrothermal.”

First digit 2 — number of inserts with the same characteristics.
Diam – name of the stone.
Cr – type of cut.
57 — number of edges.
0,29 – total carat weight of stones and the same characteristics;
3 — color class from 1 (transparent, colorless) to 9 (with visible yellowness).
5 — cleanliness class from 1 (no defects) to 12 (visible without a magnifying glass).
А – cut class.

Letter designation of the type of stone cut:

  • round – Kr;
  • oval – Ov;
  • square – Kv;
  • pear-shaped – Gr;
  • Princess cut – Pr;
  • Marquise cut – Mk;
  • Emerald cut – I.

The certificate is only valid for precious stones weighing 0,3 carats or more.

A popular synthetic insert is listed as “cubic zirconia” or “cubic zirconia.” The concepts “zircon” or “zirconium” have nothing to do with cubic zirconia.

Should you keep a jewelry tag? The label on the jewelry is the official certificate of the manufacturer about the authenticity and quality of the product! If they try to sell you a product without a tag, then you should doubt the quality of the decoration. Although, by law, the product cannot be returned to a jewelry store, manufacturers often agree to accommodate. Therefore, do not throw away the tag and sales receipt to be on the safe side and return the jewelry that did not fit on time. More details about the possibilities exchange of products in the Ukrzoloto online store, read in the special section.

The result of upgrading is not always sustainable. Stones that have undergone certain types of treatment require special care and handling..

3.1. The description of jewelry stones and organic substances, for which it is necessary to indicate special information about their refinement, must contain an international refinement code. Gemological expert reports and certificates indicate refinement codes, their interpretation and a link to the terminological standard.

3.2. For stones such as emerald, ruby ​​and sapphire, codes are used (Table 1) proposed by The Laboratory Manual Harmonization Committee (LMHC), in accordance with whose recommendations the leading laboratories of the world operate.

Table 1. Types of refining, degree of refining and their designations according to LMHC

1. No indications of heating

1. No traces of heat treatment were found

2. Indications of heating (no residue)

2. There are traces of refining (heat treatment)

3. Indications of heating with residues in fissures

3 – 4. There are traces of refining (heat treatment with filling / filler residues in cracks)

4. Indications of heating with residues in cavities

1. No indications of heating

1. No traces of heat treatment were found.

2. Indications of heating (to modify the color or transparency of the stone)

3.3. For other stones not listed in clause 3.2., when indicating the type of refining and/or the need for special care, codes developed by the American Gemological Trade Association (AGTA) are used (Table 2).

Table 2. International AGTA stone enhancement codes

Source: The Gemstone Information Manual Tenth Edition, January 2011, by ICA & AGTA

Code transcript Method Definition link
N No Not ennobled
B Whitening Bleach 2.2.14
C Coating Покрытие 2.2.16
D Dyeing Coloration 2.2.12
F Filling Filling 2.2.4
H Heating Термообработка 2.2.22
HP Heating and Pressure Heat treatment under pressure 2.2.23
I impregnation Impregnation 2.2.17
L Lasering Laser drilling 2.2.19
O Oiling/Resin Infusion Oiling
R Irradiation Irradiation 2.2.11
SC special care Special care
U Diffusion Diffusion 2.2.3
W Waxing/Oiling Waxing 2.2.1

Note: If the stone was refined using several methods, all methods are indicated.

3.4. For diamonds that have been refined using high temperatures and pressures, the code HTHP is indicated.

3.5. If the codes from Table 1 and Table 2 match, the refining is indicated for emeralds, rubies and sapphires in accordance with Table 1, for other stones – in accordance with Table 2.

3.6. Diagnosis of refining, determination of the degree of refining and assignment of a code are carried out in a gemological laboratory or indicated by the supplier of stones (cut inserts) in the accompanying documentation and transferred by the manufacturer of the product to the specifications and labels of jewelry. The codes given in this section are indicated in the cases specified in clause 2.5, when describing cut stones (jewelry inserts) on the market, including those set in jewelry. Jewelry enterprises: manufacturers, wholesale and retail trade must indicate these codes on jewelry labels. In addition to this indication, information about the refining of stones must be fully communicated in retail trade to the consumer, including using the following means: catalogues, advertising materials, wall documentation, information in product passports, via the Internet, through video presentations in jewelry stores

3.7. For a number of stones, refining by heat treatment or irradiation is a traditional and common practice. At the current level of development of gemological methods, the diagnosis of such refining in some cases is not unambiguous. In this case, the UD (Undetermined) code is used together with the wording in the comments according to clause 4.2.9.

4. Comments on improvement in certificates and expert opinions >>

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