01ST THE RUBIES OF BURMA AND ASSOCIATED MINERALS. 
171 
dark-coloured mica. From the pass down to the river in the bottom of the narrow 
valley and along to Kyaukwa, all the surface rocks immediately along the pathway 
are of finely-laminated gneiss, apparently inclining south. 
South of the Yenee, near the village of Taungwa (Taungywa), not far from the 
bridge, on the hillside there is an enormous block of dark pegmatite, which contains 
a reddish felspar, and much quartz. This curious rock is rudely foliated, and 
resembles a block of gneiss, but differs in not containing any mica. Below this rock 
in the gneiss are three small veins of quartz, two horizontal, and one vertical. The 
only other places where veins of quartz were observed was on the road to Ho wet, 
where a small one occurs, at a short distance south of Kyatpyen ; and near Kyauk- 
tain£ villao-e, where one of 18 inches thick could be traced for a short distance. 
The first four miles along the new military road from Bernardmyo to Kathay, the 
cuttings disclose semi-decomposed gneiss containing coarse, light-coloured pegmatites, 
in some of which are small, round, decomposed crystals of a brown, iron-stained 
mineral, probably garnet. Near the dividing ridge on the same road, is a small 
section of decomposed gneiss which is foliated in various directions, and incloses 
rounded e}ms of pegmatite around which its foliation curves. 
The hill to the north-east of the cantonments of Bernardmyo is composed of 
evenly foliated grey gneiss, in parts of which are nests of white, finely crystalline 
quartz. In the stream at the foot of the descent from Taungnee to the Injauk 
valley are some blocks of a very dark-coloured coarse gneiss, hornblendic gneiss, and 
pegmatite. One quarter of a mile from the bridge across the Injaukchoung is a 
white quartz-schist, apparently interfoliated in the gneiss. 
Near Thaungla the g-neiss is seen in alternating bands of fine and coarse varieties, 
the former varying in width from a few inches to one foot, whilst the latter are of 
much greater thickness. 
In ascending Sagiwa from the Kathay-Bernardmyo road, a set of massive, greenish- 
yellow beds of gneiss, containing in parts large scattered crystals of black mica, are 
crossed with ordinary gneiss near the top, on which is a coarse pegmatite. Resting 
on this is fine-textured gneiss with contorted foliation, enclosing white quartzite 
containing crystals of graphite. The peculiar greenish gneiss having a waxy appear¬ 
ance, is well-developed on the dividing ridge beyond Sagiwa to the north, and can 
be traced south-westward for over a mile towards Bolongui. This rock when 
weathered is on the surface of a light yellow colour. 
From Kyatpyen for a mile south, the gneiss is thinly foliated and wavy in parts ; 
and onwards to Nayaw (Nounghwai), some six miles to the south-south-west, it 
contains interfoliated pegmatite. At two miles from Kyatpyen the rocks are much 
decomposed, and landslips disclose the red, pink, and white colouring of the resulting 
clays and loams, similar to those seen on the south-east of Mogok valley. Close to 
the village of Nayaw is a section of coarse-jointed gneiss, dipping south-w T est at an 
angle of 50°, 
z 2 
