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BS ISO 6893:2024

BS ISO 6893:2024

$142.49

Jewellery and precious metals. Inspection of batches of small diamonds. Terminology, classification and test methods

Published By Publication Date Number of Pages
BSI 2024 30
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PDF Catalog

PDF Pages PDF Title
2 undefined
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
11 4 General
4.1 Batch specifications and characteristics
4.2 Inspection
12 5 Authentication
6 Sieving
6.1 General
6.2 Estimating the total mass of a small diamond batch by sieving and counting
6.3 Estimating a batch size by sieving and weighing
6.4 Sieving small diamonds
6.4.1 Method
13 6.4.2 Using sieving plates in a correct order
6.4.3 Maximum size of a sieved batch
6.4.4 Preventing damages of sieved diamonds
14 6.4.5 Regular control of sieve plates accuracy
7 Mass of a batch
7.1 Testing
7.2 Expression of the weighed mass of a batch
8 Measurements
8.1 Measuring small diamonds
8.2 Traditional measurements of single small diamonds
8.3 Measuring a small diamond with a profile projector
15 8.4 Measuring automatically dimensions of small diamonds in batch
8.5 Description of dimension for a batch
9 Batch size
9.1 Testing
9.2 Estimation
9.2.1 Estimation by sampling
16 9.2.2 Estimation using mass and diameter
9.3 Description
10 Sampling
10.1 Inspecting a batch by sampling
10.1.1 General conditions
10.1.2 Drawing diamond samples from a batch
17 10.2 Sampling plans for the inspection of a batch of small diamonds
10.3 Inspection plan and multiple criteria
11 Cut
11.1 Description of cut in a homogenous batch
11.2 Description of cut in an inhomogenous batch
11.3 Shape
11.4 Proportions
11.4.1 Testing the proportions of small diamonds
18 11.4.2 Description of proportion grades
11.5 Polish
11.5.1 Testing the polish of small diamonds
11.5.2 Polish grades
19 11.6 Symmetry
11.6.1 Testing the symmetry of small diamonds
11.6.2 Symmetry grades
12 Colour
12.1 Testing the colour of small diamonds
12.2 Colour grades
20 13 Fluorescence
13.1 Testing the fluorescence of small diamonds
13.1.1 Testing the fluorescence by visual means
21 13.1.2 Testing the fluorescence by spectrometry
13.2 Description of the fluorescence
14 Clarity
14.1 Testing the clarity of small diamonds
14.2 Clarity grades
22 15 Content of a test report
24 Annex A (informative) Corresponding figures for round brilliant cut
26 Annex B (informative) Flowchart for «sampling control»
29 Bibliography

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BS ISO 6893:2024
$142.49