PROFESSOR HEDDLE ON THE MINERALOGY OF SCOTLAND. 311 
Magnesia, Iron—Alumina Garnet. 
(Mg, Fe, Ca)’Si? + A1Si*. 
Pyrope. 
3. The “Elie rubies” occur imbedded in two dykes of basalt, which cut 
tufa about a mile to the east of Elie, in Fife. Here they are associated with 
nigrine, saponite, and sanidine. 
They also occur in imbedded fragments in the tuff of Elie Ness. In 
Sowersy’s “ British Minerals” there is a plate of a portion of a vein of greasy 
quartz from this spot, carrying rhombic dodecahedra of the pyrope. 
Lastly, they are to be found, also in imbedded fragments, along with nigrine 
and large rough crystals of fissured olivine in columnar basalt, at Ruddock 
Point, about one mile west of the Kincraig. 
The chips analysed were from Elie Ness. Their colour was deep port wine ; 
specific gravity, 4° 124. 
1:3 grammes yielded—- 
Silica, 5 5 5 ee 
From Alumina . : (aly 
TIOLN Haw oe 
Alumina, . f : . 22°452 
Ferric Oxide, . : : 5: 463 
Ferrous Oxide, . : : 8°107 
Manganous Oxide, . ‘ *461 
Lime, ; E 2 s 5:04 
Magnesia, . : ‘ . 17°846 
Water, , : , ; -098 
Insoluble silica, 1:127 per cent. 
Mr ConneELt believed this pyrope to contain a little chromium. I did not 
find a trace. 
Though somewhat wanting in transparency,—and although it is surpassed in 
brilliancy of appearance by the blue topaz, the beryl, and the citrine cairn- 
gorum of the Braemar district,—the Elie pyrope certainly is, weight for weight, 
| the most valuable gem obtained in Scotland. 
VOL, XXVIII. PART II. 4M 
