Kimherley Diamonds : Especially Cleavage Diamonds. 69 
Pool. Dutoitspan, 
Per cent. Per cent. 
Browns ... "28 . -39 
Dark Browns . . 4 81 . 7 00 
aa. Eejection Chips . . 13-04 . 7-53 
HH. Buhhish . . . 19-80 . 15-45 
II. Bort . . . 8-93 . 10-33 
Note.—^ome caution must be exercised in making a first approximation 
to an interpretation of these percentages. It would not be fair, for example, 
to translate them at once into carats, and thence to argue that Wesselton 
produces more good white stones than Bultfontein does just because the 
numbers opposite " whites " are greater as a rule for the former mine. 
Actually the percentages of whites in the upper classes of Bultfontein are 
diminished because of the large number of Bultfontein white, or faintly 
tinted, diamonds which contain black spots — as may be seen in Class C, and 
especially in Class F, sub-classes greys to black rejections inclusive. Were 
these spotted stones (which are not numerously represented in the Wesselton 
yield) not in existence, Bultfontein would show the higher percentages of 
good whites. 
Explanatory Notes on the Assortments. 
A. Close Goods are diamonds of good colour and symmetry and free 
from all blemishes of spots or flaws. In this, as in all the other classes, the 
sub-classes stand in the order of merit ; thus a white is esteemed more than 
a cape, a bye more than a yellow. The sub-classes are further sub-divided 
into lots arranged according to size. 
B. Irregulars resemble close goods in all respects excepting that their 
symmetry is inferior. 
C. Spotted Stones resemble close goods excepting that they contain 
internal white or black spots. 
D. Brown Stones are diamonds of good symmetry and free from blemishes, 
excepting that they have a greater or less brown or smoky hue. In the case 
of the light brown stones the colour is pretty equally distributed throughout 
the mass, as it also is in the case of the fancies (see also under A, Bult- 
fontein) which are mainly brown. On the other hand, the smoke-brown 
tint of the coated stones is often confined to the surfaces, and is due to a 
thin deposit of opaque material, probably caused by corrosion. Coated 
stones are what is called " speculative" stones, since they may be good or 
bad inside. Pretty often they are very good indeed. They always command 
a good price. Bultfontein fancies differ from Wesselton fancies. 
E. Flats differ from close goods in the matter of symmetry, namely, 
that their thickness is small in comparison with their lengtli and breadth. 
