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GB/T 32863-2016: Ruby grading
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 32863-2016	English	228	Add to Cart	2 days [Need to translate]	Ruby grading

GB/T 32863-2016: Ruby grading

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Ruby grading ICS 39.060 D59 National Standards of People's Republic of China Ruby grading 2016-08-29 released 2017-03-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released Directory Preface I 1 Scope 1 2 normative reference document 1 3 Terms and definitions 1 4 ruby identification 2 5 ruby color grading 2 6 ruby clarity grading 3 7 ruby fire color grading 4 8 ruby heat treatment 4 9 grading requirements 5 10 rubbish cut 5 11 ruby quality 6 12 ruby grading certificate 6 Appendix A (informative) Common ruby and internal and external features Type 7 Appendix B (informative) ruby observation diagram 8 Appendix C (informative) ruby heat treatment type 9 Appendix D (informative) Common types of rubhes and cut ratio of rubies 10 Reference 11

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard by the National Jade and Jade Standardization Technical Committee (SAC/TC298) centralized. The drafting of the standard units. the National Jade Jade Quality Supervision and Inspection Center, Chow Tai Fook Jewelery Bank (Shenzhen) Co., Ltd., Shenzhen City in the Thai precious stones Limited. The main drafters of this standard. storm Wei, Zheng Mingzhi, Zhao Feng, Wang Manjun, Ma Yangwei, Ke Jie, Bi Lijun. Ruby grading

1 Scope

This standard specifies the grading rules for natural, unprocessed or heat-treated, inlaid faceted polished rubies. This standard is applicable to natural non-optimized or heat-treated non-inlaid faceted polished ruby grades, Polishing rubies can be performed with reference to this document.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. GB/T 16552 Name of jewelery and jade GB/T 16553 Jewelery Identification

3 terms and definitions

The following terms and definitions apply to this document. 3.1 Ruby ruby Mainly from the Cr ion color, the color is medium to dark red corners of the corundum gem, the chemical composition of Al2O3, can contain Fe, Ti, V, Mn And other elements. Mohs hardness of 9, the refractive index of 1.762 ~ 1.770 (0.009, -0.005), birefringence value of 0.008 ~ 0.010, density 4.00 g/cm3 ± 0.05 g/cm3. 3.2 From the color, clarity, fire color, quality and other aspects of the ruby level division. 3.3 Color grading Using colorimetric method, in the prescribed environment for the color of the ruby level division. 3.3.1 Hue hue Said ruby red, purple, orange and other color characteristics. 3.3.2 Chroma Ruby color saturation and lightness after the combination of a color show the effect of a color. 3.3.3 Ruby color grading standard sample rubycolor revisedansterset An elliptical faceted ruby sample with a calibrated hue category and a chroma level, in turn, represents a different saturation level. 3.3.4 Color card A standard color card that represents a certain color. Note. In this document you can use "theMunselBookofColor-GlossyColection" for color matching. ...