GB/T 23885-2009 English PDF

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GB/T 23885-2009: Jadeite grading
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23885-2009	318	Add to Cart	2 days	Jadeite grading	Valid

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Basic data

Standard ID: GB/T 23885-2009 (GB/T23885-2009)
Description (Translated English): Jadeite grading
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D59
Classification of International Standard: 39.060
Word Count Estimation: 20,247
Date of Issue: 2009-06-01
Date of Implementation: 2010-03-01
Regulation (derived from): PRC National Standard Approval Announcement 2009 No.7 (Total No.147)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard provides a natural and not inlaid jade inlaid polished grinding classification rules. This standard does not apply to natural jade inlay and mosaic grinding polishing.

GB/T 23885-2009: Jadeite 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.
Jadeite grading ICS 39.060 D59 National Standards of People's Republic of China Emerald rating Posted 2009-06-01 2010-03-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Introduction Ⅲ 1 Scope 1 2 Terms and definitions 1 3 Emerald (colorless) grade 3 4 emerald (green) grade 5 5 Emerald (purple) and Jade (red - yellow) grade 7 Claim 7 6 rating 7 Emerald unevenness evaluation 7 8 Emerald Technology Assessment 8 9 Emerald 8 Quality 10 Emerald grading certificate 8 Appendix A (normative) Methods of measurement --- Jade transparency spectral photometric method 9 Annex B (informative) emerald (green) color measurement method --- spectrophotometric color measurement method 11 Annex C (informative) emerald (green) color and shape distribution of 13 Annex D (informative) Emerald Technology Assessment 14 Annex E (informative) Emerald common internal and external features 15 References 16

Foreword

The Standard Appendix A, Appendix B, Appendix C, Appendix D, Appendix E is an information appendix. The standard proposed by the People's Republic of China Ministry of Land Resources. This standard by the National Standardization Technical Committee jewelery. This standard was drafted. Gems & Jewelry Management Center. The main drafters. Zhang Beili, Wang Manjun, Ke Jie, Sun Fengmin, Zhang Hui, Zhang Jian, Ma Yang Wei, violence Wei, Guo Tao, Chen. This standard is the first release. Emerald rating

1 Scope

This standard specifies a natural mosaic not polishing and grinding jade inlaid classification rules. This standard applies to non-natural mosaic and inlaid polished polished jade.

2 Terms and definitions

The following terms and definitions apply to this standard. 2.1 Mainly composed of jadeite and jadeite or by the other Na, sodium calcium pyroxene (sodium chromium pyroxene, green pyroxene) consisting of a process value mineral collection Body may contain small amounts of amphibole, feldspar, chromite and other minerals. Mohs hardness of 6.5 to 7, and density 3.34 (+ 0.06, -0.09) g/cm3, refractive Rate 1.666 ~ 1.680 (± 0.008), measured 1.65 to 1.67 points. 2.1.1 Colorless or low color saturation emerald. 2.1.2 Main color is green hue, saturation and has a certain emerald. 2.1.3 The main color is purple hue, saturation and has a certain emerald. 2.1.4 Body color and a color of red - yellow, and has a certain saturation emerald. 2.2 From the color (colour), transparency (transparence), texture (texture), clarity (clarity) of the four-level plans were emerald Points and evaluation of their processes (artsandcrafts). 2.2.1 From transparency, texture, clarity three aspects Emerald (colorless) were divided into levels, and evaluate its processes. 2.2.2 From the color, four of transparency, texture, clarity emerald (green) were divided into levels, and evaluate its processes. 2.2.3 From four color, transparency, texture, clarity emerald (purple) and Jade (red - yellow) level is divided, and its technology into Evaluated. ......

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