300 PROFESSOR HEDDLE ON THE MINERALOGY OF SCOTLAND. 
It was found generally in crusts of pale pea-green crystals, in the form of 
the rhombic dodecahedron. These crusts of crystals passed frequently 
internally into a massive granular form, generally of the same colour—rarely 
becoming somewhat red-brown. 
The crystals are sometimes isolated, of the size of peas, the colour of which 
they more resemble than that of the gooseberry. 
The tint is finer and much more uniform than that of the Wilui crystals ;— 
they are, however, more opaque and muddy. 
Their specific gravity is 3° 545. 
1°313 grammes yielded— 

Silica, . 4 . °494 
From Alumina, . 4, °.029 
“bo = 39 * 832 
Alumina, . ; : STON, 
Ferric Oxide, . =. =. «15 065 
Ferrous Oxide, . ; : *108 
Manganous Oxide, . : °353 
Lime, : 3 ; . hee. S65 
Magnesia, . P : * peiah2 
Water, vs... : : * 045 
SOMnTie 
Insoluble silica, 17 *208 per cent. ; possible impurity unknown ; it has to be 
remarked, however, that in all analyses of garnet. there must be a small admix- 
ture of quartz, from abrasion of the agate mortar. ; 
These crystals are to be very rarely obtained in two or three of the small 
quarries on the south face of the hill ; in one of these I obtained a specimen of 
aplome, of a brown colour—the striation parallel to the shorter diagonal of the 
rhombic face was exceedingly well marked. 
Grossular also occurs very rarely in the limestone quarry at Crathie, 
Deeside. 
Lime, Iron—Alumina Garnet. 
(Ca’, Fe)? Si? + Al,” Si? 
Cinnamonstone. 
2. This variety occurs in great abundance in the limestone quarry at 
Dalnabo, Glen Gairn. Here it occurs of an exceedingly fine colour, and also 
of a brownish tint. Of this latter colour it is also found in the quarryings on 
Leach Ghorm, at Crathie, at Boultshoch, and elsewhere in the district. . 



