{"id":321835,"date":"2024-10-19T22:16:36","date_gmt":"2024-10-19T22:16:36","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-240162020\/"},"modified":"2024-10-25T20:44:10","modified_gmt":"2024-10-25T20:44:10","slug":"bs-iso-240162020","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-240162020\/","title":{"rendered":"BS ISO 24016:2020"},"content":{"rendered":"

This document specifies the terminology, classification and the methods that are used for the grading and description of single unmounted polished diamonds over 0,25 carat (ct).<\/p>\n

This document applies to natural, unmounted, polished diamonds. It is not to be used for fancy coloured diamonds, synthetic diamonds, treated diamonds (other than is allowed for in 7.4<\/span>), nor for assembled stones.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
7<\/td>\nForeword <\/td>\n<\/tr>\n
8<\/td>\nIntroduction <\/td>\n<\/tr>\n
9<\/td>\n1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
13<\/td>\n4 General
4.1 The use of the word \u201cdiamond\u201d <\/td>\n<\/tr>\n
14<\/td>\n4.2 Composite stones\/assembled stones
5 Mass and measurements
5.1 Mass
5.2 Measurements
6 Colour
6.1 General
6.1.1 Colourless to yellow, brown and grey (D to L) <\/td>\n<\/tr>\n
15<\/td>\n6.1.2 Colourless to yellow, brown and grey (M to Z)
6.1.3 Other hues
6.2 Colour grades (colourless to yellow, brown and grey)
6.3 Colour grades (other than for yellow, brown and grey) <\/td>\n<\/tr>\n
17<\/td>\n6.4 Fluorescence <\/td>\n<\/tr>\n
18<\/td>\n7 Clarity
7.1 General
7.2 Clarity grades
7.3 Clarity characteristics
7.4 Laser drilling <\/td>\n<\/tr>\n
20<\/td>\n8 Cut
8.1 Cut characteristics
8.2 Shape
8.3 Proportions
8.3.1 Description
8.3.2 Basis for descriptions of proportions <\/td>\n<\/tr>\n
21<\/td>\n8.3.3 Table size (percentage)
8.3.4 Crown height (percentage) and\/or crown angle (degrees)
8.3.5 Pavilion depth (percentage) and\/or pavilion angle (degrees)
8.3.6 Girdle thickness (percentage) and description <\/td>\n<\/tr>\n
22<\/td>\n8.3.7 Culet size (percentage) and description
8.3.8 Total depth\/height
8.3.9 Proportions comment <\/td>\n<\/tr>\n
25<\/td>\n8.4 Finish
8.4.1 Polish
8.4.2 Symmetry <\/td>\n<\/tr>\n
26<\/td>\n9 Identification
10 Testing mass and measurements
10.1 Testing mass
10.2 Testing measurements
11 Testing and grading colour and fluorescence
11.1 Cleaning of masterstones
11.2 Masterstones for colour <\/td>\n<\/tr>\n
27<\/td>\n11.3 Procedure
11.3.1 Precautions
11.3.2 Cleaning
11.3.3 Comparisons
11.3.4 Round stones
11.3.5 Fancy shapes
11.3.6 Colours
11.3.7 Lighting
11.3.8 Positioning <\/td>\n<\/tr>\n
28<\/td>\n11.3.9 The grade <\/td>\n<\/tr>\n
29<\/td>\n11.3.10 Master-eye effect <\/td>\n<\/tr>\n
30<\/td>\n11.4 Description of fluorescence
11.4.1 Equipment and References
11.4.2 Masterstones for fluorescence
11.4.3 Working conditions and methodology
11.4.4 Fluorescence, other than blue <\/td>\n<\/tr>\n
31<\/td>\n12 Testing and grading clarity
12.1 General
12.2 Apparatus
12.3 Procedure
12.3.1 General
12.3.2 Lighting
12.3.3 Distance
12.3.4 Plotting <\/td>\n<\/tr>\n
33<\/td>\n12.3.5 Plotting symbols <\/td>\n<\/tr>\n
35<\/td>\n12.3.6 Laser drill holes
12.3.7 Surface grain lines <\/td>\n<\/tr>\n
36<\/td>\n12.3.8 Internal graining
12.3.9 General
13 Testing shape
14 Testing and grading proportions
14.1 Appropriate instruments
14.2 Description
14.2.1 Table sizes
14.2.2 Crown height <\/td>\n<\/tr>\n
37<\/td>\n14.2.3 Pavilion depth
14.2.4 Girdle thickness
14.2.5 Culet size
14.3 Proportions comments
15 Grading of symmetry and polish (Finish)
15.1 Symmetry <\/td>\n<\/tr>\n
39<\/td>\n15.2 Polish <\/td>\n<\/tr>\n
40<\/td>\n16 Expression of results
17 Comments <\/td>\n<\/tr>\n
41<\/td>\n18 Diamond grading report <\/td>\n<\/tr>\n
43<\/td>\nAnnex A (normative) Clarity, polish and symmetry characteristics <\/td>\n<\/tr>\n
46<\/td>\nAnnex B (informative) Clarity examples <\/td>\n<\/tr>\n
63<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Jewellery and precious metals. Grading polished diamonds. Terminology, classification and test methods<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2020<\/td>\n64<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":321839,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[41,2641],"product_tag":[],"class_list":{"0":"post-321835","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-01-040-39","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/321835","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/321839"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=321835"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=321835"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=321835"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}