GREEN lEOX EARTH. 



Localities. — Scotch. Near Old Kilpatrick, 

 S. Dumbarton. Kinnoul Hill near Perth. 

 Little Cambray in the Isle of Arran. — 

 Irish. In the trap and amygdaloidal rocks 

 of Antrim, — Foreign. Faroe Isles. Saxony. 

 Bohemia. Fassa in the Tyrol. Monte Baldo 

 near Verona, &c. The Green Earth of 

 Iceland occurs with Zeolites, and affords a 

 trace of Vanadium. (S.G. 2-677.) 



Brit. Mus., Case 32. 



Gkeen Iron Earth, Phillips. See Hy- 

 pochlorite. 



Green Iron Ore ; Green Iron Stone, 

 Karsten. A mineral of similar nature to 

 Dufrenite (which see). 



Analysis, from Siegen in Prussia, by 

 Karsten ; 



Peroxide of iron . . . 63-45 

 Phosphoric acid . . . 27-72 

 Water 8-56 



99-73 



Green Lead Ore, Jameson. Mimetite. 



Green Malacolite. See Pyroxene. 



Green Martial Earth, Kirwan, See 

 Hypochlorite. 



Green Vitriol, Allan. See Copperas. 



Greenlandite. The name given to the 

 Precious Garnet of Greenland. 



Analysis, by Karsten : 





Silica .... 



. 39-85 



Alumina 



. 20-60 



Protoxide of iron . 



■. 24-85 



Proto^de of manganese 



. 0-46 



Magnesia 



. 9-93 



Lime .... 



. 3-5i 



99-20 



Greenlandite. The name given by 

 Breitliaupt to Columbite crystals from the 

 Cryolite vein of Greenland. 



Greenockite, Brooke ^ Connel, Brei- 

 thaupt, Greg ^- Lettsom, Dana. Hexagonal ; 

 hemimorphous, that is to say, with the op- 

 posite extremities of the crystal dissimilar. 

 Colour hone V -yellow, orange-yellow, brown, 

 veined parallel with the axes. Translucent, 

 sometimes transparent or opaque. Lustre 

 adamantine inclining to resinous. Streak 

 between orange -yellow and brick-red. 

 Strong double refraction : index of refrac- 

 tion 2 688. II. 3 to 3-5. S.G. 4-8 to 4-9. 



GRENAT BLANC. 163 



Comp. Sulphide of cadmium, or Cd S = 

 cadmium 77*77, sulphur 22-23=100. 

 Analysis, by Connel : 



Cadmium .... 77-30 

 Sulphur .... 22-56 

 Iron trace 



99-86 

 Decrepitates, when heated, somewhat 

 strongly. Becomes carmine-red whenever 

 it is heated, recovering its yellow colour on 

 cooling. 



BB on charcoal decomposed, and a yel- 

 lowish-red ring of oxide of cadmium is de- 

 posited. 



Soluble in strong muriatic acid, with vio- 

 lent evolution of sulphuretted hydrogen, 

 and without separation of sulphur. 



Localities. — Scotch. This rare mineral was 

 first found in short hexagonal crystals in a 

 railway cutting, at Bishoptown, near Pais- 

 ley, in Renfrewshire. It occurred in small, 

 but very perfect and brilliant, short hexa- 

 gonal crystals, in a porphyritic greenstone, 

 on Prehnite, and associated with Calcite 

 and Natrolite. It has also been met with 

 on the north of the Clyde, at Bowling- 

 quarry, near Old Kilpatrick, and elsewhere. 

 It has also been obtained as a furnace pro- 

 duct. 



Name. In compliment to Lord Greenock, 

 now Earl Cathcart, by whom it was first 

 noticed. 



Brit. Mus., Case 6. 



3L P. G. Principal Floor, Wall-case 12, 

 Nos. 543, 544 (British). 



Greenovite, Dufrenoy. A dark rose- 

 coloured variety of Sphene, from St. Marcel, 

 in Piedmont, in which a portion of the lime 

 is replaced by protoxide of manganese. 

 S.G. 3-527. 



Fig. 221. 



Fig. 219. 



Fig. 220. 



Analysis, by Delesse : 

 Silica .... 

 Titanic acid . 

 Protoxide of manganese 



Lime 



30-4 



42-0 



3-6 



24-3 



100-3 



Brit. Mus., Case 37. 



Grenat, Brochant, Haiiy. See Garnet. 



The French word Grenat is in allusion to 

 the resemblance of the stone in colour to 

 the seeds of the pomegranate. 



Grenat Blanc, Dufrenoy. See Leucite. 

 M 2 



