PROFESSOR HEDDLE ON THE MINERALOGY OF SCOTLAND. 217 
The boulder may have weighed somewhere about 100 tons: the vein was 
about two feet in width. The accompanying minerals, arranged as far as 
possible in the order of their occurrence from without inwards in the vein, 
were :—Babbingtonite—which is found in one other locality only in Scotland,— 
purple fluor, sphene, Allanite, zircon, orangite, passing into thorite—found 
nowhere else in Scotland,—magnetite, lepidomelane, radiated Cleavlandite, 
ilmenite, glauconite (?),* quartz, specular iron, and crystals of a new radiated 
hydro-carbonate of lime. The amazonstone was inferior to the four latter. 
Of the numerous forms in which the amazonstone crystallised, certain are 
depicted in Plate X VIII. ;—two crystals, which were unterminated prisms, and 
which were unavoidably broken in the extraction, had the following very 
unusual dimensions :— 
Length along band c. Breadth over 0d. Breadth over ¢. 
1st Crystal, : ‘ 15% inches, 10 inches, 8 inches. 
2d “ ‘ , ae NS Oe ies 
A magnificent museum specimen, now in the possession of the Duke of 
SUTHERLAND, shows, on a surface of some three square feet, eight perfect and 
some half a dozen imperfect crystals of amazonstone, of the size of the fist. 
This amazonstone, frequently in hemitrope crystals, is pervaded through- 
out with a white material forming a corded structure, which will be further 
specially noticed. 
The finest of these amazonstones are of a beryl green colour, and trans- 
lucent. They have a cleavage angle of 89° 43’, and a specific gravity of 2°569. 
The contact minerals were quartz and lepidomelane ; but the specimen picked 
seemed quite pure from all but the whiter layers. 
1:313 grammes yielded— 

Silicay : ‘ + Sk 
From Alumina, : . 033 
843: = 64° 204 
Alumina, 5 : : 18 +395 
Ferric Oxide, ; : * 455 
Protoxide of Manganese, *152 
Lime, . ; - F 725 
Magnesia, . : d 076 
Potash, : : . Ts (oe 
Soda, . : : : 2 *952" 
Water, . ; : . * 512 
100 * 223 
Insoluble silica, 1°66 per cent. 
Copper, chromium, and nickel were specially sought for, but no trace 
found. Nor was there a trace of Ferrous Oxide. 
* Or Saponite or Strigovite ;—not yet analysed. 
VOL. XXVIII. PART I. 3 L 
