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GB/T 44910-2024: Amber grading
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| GB/T 44910-2024 | English | 439 |
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Amber grading
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GB/T 44910-2024
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Basic data | Standard ID | GB/T 44910-2024 (GB/T44910-2024) | | Description (Translated English) | Amber grading | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D59 | | Classification of International Standard | 39.060 | | Word Count Estimation | 22,259 | | Date of Issue | 2024-11-28 | | Date of Implementation | 2025-06-01 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | GB/T 44910-2024: Amber grading---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 39.060
CCSD59
National Standard of the People's Republic of China
Amber grading
Released on 2024-11-28
2025-06-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Body color classification 2
4.1 Body color classification rules 2
4.2 Body color classification requirements 4
4.3 Recording and Presentation of Results 5
5 Fluorescent color classification 5
5.1 Fluorescent color classification rules 5
5.2 Fluorescent color classification requirements 6
6 Transparency Grading 7
6.1 Transparency Division Rules 7
6.2 Transparency Grading Requirements 7
7 Clarity Grade 7
7.1 Clarity Classification Rules 7
7.2 Clarity Grading Requirements 8
8 Quality and size 8
8.1 Quality 8
8.2 Size 8
9 Classification environment requirements 8
10 Rules for Classifying Inhomogeneous Samples 8
11 Grading Certificate 8
Appendix A (Informative) Amber Grading Observation Method 10
Appendix B (Informative) Transparency Level Observation Characteristics 11
Appendix C (Informative) Usage of Amber Trade Names and Corresponding Characteristics 12
Reference 14
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document is proposed by the Ministry of Natural Resources of the People's Republic of China.
This document is under the jurisdiction of the National Technical Committee on Jewelry and Gemstone Standardization (SAC/TC298).
This document was drafted by. Shanghai Institute of Metrology and Testing Technology, Guangdong Jewelry, Jade and Precious Metals Testing Center, National Jewelry and Jade
Jewelry Inspection Group Co., Ltd., China University of Geosciences (Wuhan) Jewelry Testing Center, Hubei Vocational College of Land and Resources, Guangzhou Yuxiong Jewelry
Co., Ltd., Zhile Trading (Shanghai) Co., Ltd., Shanghai Tianshun Jewelry Co., Ltd., Tengchong Hupoge Jewelry Co., Ltd., Shenzhen Bao
Century Amber Museum in An District, Guangzhou Randao Culture Media Co., Ltd., Shanghai Jianqiao University Co., Ltd., Shanghai Lao Fengxiang Co., Ltd.,
Shanghai Arts and Crafts Co., Ltd., Chongqing Metrology and Quality Inspection Institute, Shenzhen Gilder Technology Co., Ltd., Shanghai Gemstone Industry
association.
The main drafters of this document are. Zhao Bowen, Wang Yamei, Li Haibo, Chen Dingying, Long Chu, Lv Xiaoyu, Wang Duo, Zhang Jun, Xiong Yan, Zhang Zhiqing,
Chen Xiaoming, Cai Chuxiong, Wang Xuan, Ke Shaojun, Li Zhong, Chen Guang, Kong Fanli, Tu Cai, Wu Yu, Hong Jiaxiong, Li Ran, Gao Yujie, Li Lansen, Hua Wenxian.
Amber grading
1 Scope
This document specifies the classification method, classification rules and requirements, quality and
Dimensions, grading environment requirements, grading rules for uneven samples, grading certificates.
This document applies to the grading of natural ground and polished amber (golden amber, beeswax, blood amber, blue amber).
The fluorescence color grades in this document apply to blue amber.
The transparency and clarity grading of other types of natural polished amber shall be carried out for reference.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 16553 Jewelry and Jade Identification
GB/T 37460 Identification and classification of amber
3 Terms and definitions
The terms and definitions defined in GB/T 37460 and the following apply to this document.
3.1
Amber is evaluated in terms of color (including body color and fluorescent color), transparency, clarity, etc., and its quality and size are measured.
3.2
Body color
The color of amber is formed by the scattering, reflection and selective absorption of light.
3.3
Hue
It represents the color characteristics of amber such as red, orange, yellow, green, and blue, and can be used to describe the body color and fluorescent color of amber.
Note. When used alone without limitation, it refers to body color hue by default.
3.4
Brightness value
The lightness or darkness of amber's body color.
3.5
Chroma
The intensity of amber's body color.
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