I 12 
Mines and Mineral Statistics, 
In some the crystalline form is well and distinctly shown, but 
others possess very much rounded faces. Some of the best crystals 
were those of the triakis-octahcdron, the triakis-tetrahedron, the 
octahedron, the tctrakis-hexahedron (or four faced cube), and the 
hcxakis-octahedron. 
^"o fractured specimens have been detected, but it is rather 
common to find them with very much pitted surfaces, and with 
internal black specks. 
Ojie of the Companies, when prospecting the ground, found the 
drift to yield as follows : — 
6 loads yielded ... ... 41 diamonds 
4.V 
6 
0 
6 
G 
Eefusefrom machines, &c. 
143 
SS 
125 
163 
89 
41 
344 G90 diamonds, 
or an average of 20 diamonds per ton of stuff, regarding the load 
as equal to one ton. The above were obtained by the Glwydir 
Diamond Mining Company. 
The following is an account of the number obtained by Messrs. 
"Westcott & M‘Caw from the Eaglehawk claim, up to August 
26th, 1873 
400 diamonds, 
weighing ... 
192 grains 
420 
11 
... 199 „ 
310 
71 
11 
... 153 „ 
200 
11 
11 • • • 
... 109 „ 
350 
11 
11 
... 150 „ 
1,680 
11 
11 
803 „ troy 
And, as examples of the number obtained per load of stuff, the 
following may be cited : — 
5 loads yielded 86 diamonds, weighing 32 grains. 
8 loads yielded 68 diamonds, weighing 30 grains. 
Up to the present no large diamonds have been found, the 
largest hitherto met with being one only of 8 grains 
1 of 4 grains 
6 of 3 „ 
85 of 2 „ 
1,587 of less than 2 grains. 
No mention is made of the kind of drift from which the above' 
quantities were obtained ; they, however, afford an opportunity 
of roughly estimating the yield. 
