22 APATITE. 



and the lateral edges are sometimes re- 

 placed. Colours, usually pale and most com- 

 monly white, yellowish -white, wine-yellow, 

 green, blue, or bluish-green, and red,' which 

 are sometimes intermixed in the same 

 crystal. Externally it is splendent; in- 

 ternally the lustre is shining and resinous 

 approaching to vitreous. Transparent to 

 opaque. A bluish opalescence is some- 

 times displayed in the direction of the 

 vertical axis. Brittle. Cross fracture un- 

 even, approaching to small-conchoidal. H. 5. 

 S.G. 3-25, 



Crnip. 3 Ca3 P + Ca (CI, F) = phosphoric 

 acid 42-26, lime 50*0, fluorine 3-77, calcium 

 3-97 ; or phosphate of lime 92-26 and fluoride 

 of calcium 7-74, with part of the fluoride 

 sometimes replaced by chloride. 



Analysis hyG. J?ose, from Cabo de Gata, 

 Spain: S.G. 3-235. 



Phosphate of lime . . 92-066 

 Chloride of calcium . . 0-885 

 Fluoride of calcium . . 7-049 



100-000 

 BB fusible with difiiculty on thin edges : 

 with borax forms a clear globule, and in salt 

 of phosphorus dissolves in great quantity, 

 affording a transparent glass, which when 

 nearly saturated becomes opaque on cool- 

 ing, and presents crystalline faces. Some 

 varieties are phosphorescent when placed 

 on ignited charcoal, and before the blowpipe. 

 Localities. — English. Cornwall, of a grey- 

 ish blue at Stenna Gwynn near St. Austell ; 

 St. Michael's Mount ;'Huel Kind, near St. 

 Agnes; Fowey Consols and Huel Franco 

 {Frniicnlite), near Tavistock. Cumberland 

 at the foot of Brandygill, Carrock Fells, of 

 the fiirm of Jigs. 22 and 23. Devonshire at 

 Bovey Tracey, in crystals sometimes two 

 inches long, associated with black Tourma- 

 line. — Scotch. Dee side in Aberdeenshire. — 

 Irish. Near Kilroot, co. Antrim, in granite; 

 near Hilltovvn, Dublin ; and at Killiney 

 Hill, in limestone. — Foreign. Ehrenfrieders- 

 dorf and Schneeberg in Saxony ; Schlacken- 

 wald in Bohemia, Pfitsch-Thal in Tyrol, St. 

 Gotthard in Switzerland, Krageroe and 

 Snarum in Norway, and (according to Nor- 

 denskiold) in Bucharia in Asia, in crystals 

 of a blue colour, (Lazur-apatite) associated 

 with Lapis Lazuli. An hexagonal prism of 

 a pale amethyst colour, in the Brit. Mus. 

 (Case 57 B.), said to be from the neighbour- 

 hood of St. Petersburg, was purchased by 

 Mr. Greville for 78/. Professor Voelcker 

 states that all the specimens of Apatite 

 ■which he obtained from Krageroe, were 



APHPJZITE. 

 perfectly free from fluorine and contained 

 variable quantities of chloride of calcium. 

 In Spain, at Logrosan in Estremadura, the 

 massive varieties are used for building-stone. 

 Losacio, province of Zamora, near Portugal. 

 Apatite usually occurs in crystalline rocks, 

 especially in those containing tin veins and 

 iron ore : it is also found in granular lime- 

 stone, and sometimes in serpentine. 



The name, derived from ocrxrixM (to de- 

 ceive), was given to this mineral by Wer- 

 ner, in consequence of the fallacious resem- 

 blance it bears to other minerals. For 

 varieties, see Asparagus stone, Moro- 

 xiTE and Phosphorite. 

 Brit. Mus., Case 57 B, 

 31. P. G. Horse-shoe Case, Nos. 312 to 

 317: Wall Case, 25. 



ApAToiD, one of the minerals found in 

 meteorites, which have been named by 

 Prof. C. U. Shepard. It occurs in very 

 minute quantity, in small, yellow, semi- 

 transparent grains in the Richmond stone, 

 and sparingly in that of Bishopsville. H. 

 5-5. It is so named from its resemblance 

 in appearance to Apatite, but chemically 

 it differs from the latter in not containing 

 phosphoric acid. 



f A name forClino- 

 clase ; from ccipoe.- 

 v'h;, unmanifest ; 

 in allusion to the 

 extremely mi- 

 nute crystals in 

 which it occurs. 



Apherese, Beudant. See Libethenite. 



From a.<f,ix,l^i(ng^ subtraction ; in allusion to 

 its being only a variety of an already 

 recognised species. 



Aphrite, Phillips, is a nearly pure car- 

 bonate of lime, difiering from Schiefer-spar 

 in being less coherent. It has a very pale 

 yellowish, nearly silver-white colour, some- 

 times approaching to greyish-white. Occurs 

 massive and disseminated, sometimes solid, 

 more often in a loose or friable state, and 

 composed of fine scaly particles, with a 

 shining lustre intermediate between semi- 

 metallic and pearly. It is opaque and very 

 soft. It is usually found in veins or cavities 

 in limestone rocks. It occurs in Kessia, and 

 in the neighbourhood of Gera, in the forest 

 of Thuringia. 



Brit. Mus.,' Case 46. 



Aphrizite : Aphrysite : Aphryzite, 

 Dufrenoy. A subvariety of Tourmaline, 

 occuring in small, brilliant, black crystals, 

 bearing a resemblance at first sight to those 

 of tin-ore. It is found in white Quartz, isi 



Aphanese, Beudant. 

 Aphanesite, Dana. 



