122 EHLITE. 



and of a yellowish or chestnut-brown colour, 

 but internally the brown colour forms irregu- 

 lar concentric zones, between which are black 

 spots, and small black dendritic markings 

 in a base of a pale yellowish- brown colour. 

 Towards the centre the colour becomes yel- 

 lowish-grev, often passing into cream-yel- 

 low. S.G/2-56 to 2-6. 



Egyptian Jasper, Avhen cut and polished, 

 is used as a brooch-stone and for other orna- 

 ments. A specimen in the British Museum 

 (Case 24) is remarkable for the resemblance 

 which the markings on its fractured surface 

 bear to the portraits of the poet Chaucer, the 

 effect being similar to a drawing done in sepia. 



31. P. G. Horse-shoe Case, Nos.565 to 567. 

 See foot-note to Agate. 



Ehlite, Breithuvpt, Hei-mann. A mineral 

 nearly allied to Phosphorochalcite and to 

 Libethenite. Tt occurs amorphous ; also in 

 reniform or botryoidal masses, Avith a radi- 

 ating foliated structure. Colour verdigris- 

 to emerald-green. Lustre pearly. Streak 

 paler than the colour. Fracture conchoidal. 

 H. 1-5 to 2. S.G. 3-8 to 4-27. 



Comp. Cu5 ir* + 3 H = oxide of copper 66-9, 

 phosphoric acid 24 0, water 9*1 = 100-0. 



Analysis from Tagilsk, by Hermann ; 

 Phosphoric acid . . . 23*14 

 Oxide of copper . . . 66*86 

 Water 10*00 



100-00 



BB in the matrass gives off water, and 

 flies into powder with great vivacity. 



Locality. Ehl, in Prussia (whence the 

 name). Nischne Tagilsk in concretionary 

 masses, with a radiating concentric structure. 

 Ehrenbkrgite, Nogcjenrath. An amor- 

 phous variety of Epistilbite, of a rose-i-ed 

 colour. Fracture granular. 

 Analysis by Schnabel : 



Silica 56*77 



Alumina .... 15*77 

 Peroxide of iron . . .1*65 

 Protoxide of manganese . C*80 



Lime 2*76 



Magnesia . . . .1*30 

 Potash and soda . . . 3*78 

 Water and organic matter . 17*11 



100*00 

 Localitj/. Steinbruch, in Hungary, form- 

 ing nodules in trachyte. The Siebenge- 

 birge, near Bonn. 



Name. After Professor Ch. G. Ehrenberg, 

 of Berlin. 

 EiSENALAuN. See Halotrichite. 



etsennatrolith. 



EisENAPATiT, Fuchs. See Zwieselite. 



EiSENBi;Au. See Vivianite. 



EiSENANATAs. The name given by Yol- 

 ger to Martite, on the supposition that it is 

 a pseudomorphous form of the deutoxide of 

 iron, which he supposes to be isomorphous 

 with Anat^se. 



EisENCHLORiTE. See Delessite. 



EisENCHROM. See Chromic Iron. 



EisENGLANz. \ See Hema- 



ElSENGLIMMER. Werner, j TITE, 



Eisengymnite. See Hydrophtte. 



EisKNKiES, V. Leonhard. See Iron 

 Pyrites. 



EisENKiESEL, Werner. A variety of 

 Ferruginous Quartz, found in Bohemia, in 

 iron-stone veins in the Harz, and at Alten- 

 berg in Upper Saxony. 



ElSENKOBALTERZ, ElSENKOBALTKIES. See 



Safflorite. It is identical in composition 

 with Chathamite. 



EiSKNMUi.M. An earthy variety of Mag- 

 netite, occurring at the Alte Birke Mine, in 

 the neighbourhood of Siegen, in Prussia, 

 w^here a vein of Spathic Iron is broken 

 through by basalt and partially convei-ted 

 into Magnetic Iron-ore. It is a black, pul- 

 verulent mass, which attaches itself closely 

 to anything on which it is rubbed, and is 

 strongly attracted by the magnet. S.G. 3-76. 



Comp. Ee (Fe Mn) or Magnetite, in 

 which about half the protoxide of iron is 

 replaced by protoxide of manganese, which 

 is isomorphous with it. 



Analysis, bv Genth : 



Peroxide" of iron . . , 66*20 



Protoxide of iron . . .13*87 



Protoxide of manganese . 17*00 



Oxide of copper . . .0-09 



Sand, &c. . . . . 1*75 



98*91 

 EisENNATROLiTH. An Iron-Natrolite 

 occurring in dull green, opaque prismatic 

 crystals, and semicrystalline plates, with the 

 Brevicite of Brevig in Norway. It has one- 

 fourth of the alumina replaced by peroxide 

 of iron. H. 5. S.G 2*35. 



Analysis, by C Bergemann : 



Silica .... 46*54 

 Alumina . . . .18-94 

 Peroxide of iron . . . 7 49 

 Soda (and a little potash) . 14-04 

 Protoxide of iron . . . 2 40 

 Protoxide of manganese . 0*55 

 Water 9*37 



99-33 



