GB/T 37063-2018Freshwater cultured pearl mussels and classification of pearls (English PDF)
淡水育珠品种及其珍珠分类
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 28, 2018
Implementation date
July 1, 2019
Scope
GB/T 37063-2018 is the English-translated version of 淡水育珠品种及其珍珠分类.
GB/T 37063-2018 sets out how the mussels used in Chinese freshwater pearl culture and the pearls they produce are classified and named. It defines the terms of the trade, from host and donor mussels and the mantle tissue pieces cut for implantation to the pearl nucleus, the nucleus of free pearls and the mold nucleus of shelled pearls.
It then gives the classification of freshwater cultured pearl mussel varieties and the naming rules for freshwater pearls. It applies to the classification and naming of freshwater pearl culture varieties and freshwater pearls, and works alongside GB/T 16552 and GB/T 16553 on gem names and identification and GB/T 18781 on pearl grading. It was issued on 28 December 2018 and has applied since 1 July 2019.
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Document preview — GB/T 37063-2018
National Standard of the People's Republic of China
- ICS
- 67.120.30
- Classification
- B 52
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
1 Scope
This standard specifies the terms and definitions of freshwater cultured pearl varieties and their pearl classification, freshwater cultured pearl cultivars, freshwater pearls and freshwater treasures. The naming rules for beads.
This standard applies to the classification and naming of freshwater pearl breeding varieties and freshwater pearls.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 16552 Jewelry and Jade Name
GB/T 16553 Jewelry and Jade Identification
GB/T 18781 pearl grading
3 Terms and definitions
The following terms and definitions as defined in GB/T 16552, GB/T 16553, GB/T 18781 apply to this document.
3.1 Host freshwater mussel
Female mites used for planting and nucleating beads.
Note: It mainly includes the spinnaker, the pool butterfly, the pleated crown and the recreation.
3.2 Donor freshwater mussel
It is used to grow the mother's cell of tissue cells.
3.3 Mantle tissue piece
The tissue cell sheets suitable for beading surgery are cut from the lateral epithelial tissue of the mantle.
3.4 Pearl nucleus
It is used to mix the small pieces of cells into the bead buds and cultivate the core objects of the pearls.
Note: Includes bead core and core.
3.5 Nucleus
Used to cultivate the core of free pearls.
3.6 Mold nucleus
Used to cultivate the core of the shelled pearl.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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Related Standards
GB/T 16552-2017 — Gems - Nomenclature
GB/T 16553-2017 — Gems - Testing
GB/T 18781-2023 — Cultured pearl grading
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GB/T 37063-2018
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