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The goods mined at South Africa are sorted and classified at Kimberley as follows:
1. Close goods 2. Spotted stones 3. Rejection cleavage 4. Fine cleavage 5. Light brown cleavage 6. Ordinary and rejection cleavage 7. Flats 8. Naats 9. Rubbish 10. Boart
Classification According to Color
Close Goods are supposed to be pure stones of desirable shapes. Spotted Stones are crystals slightly spotted. Rejection Stones are those seriously depreciated by spots. Cleavage are broken stones. Flats are flat crystals. The refuse classed as Rubbish and Boart is polishing material. The first eight classes are supposed to be further subdivided according to shades, as follows:
Blue white First Cape Second Cape First bye Second bye Off color Light yellow Yellow
Only the first grade or close goods are really carefully graded according to these eight shades. With the other grades the sorters are less particular. Each color is again sub-divided into several sizes, and when the goods arrive in London the Syndicate again sorts them into
Finest extra blue white, Fine Capes Extra blue white, Capes Finest blue white, Byewaters Blue white, Yellows Finest white, Finest light brown White, Light brown Silver Capes, Brown and dark brown
All these colors are divided into shipments of Closed Goods, Spotteds, Irregulars, Blocks, Naats, and Flats. |
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Precious Stones Guide Vol 3
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