504 Ajialysis of Pink Scapolite. 



investigations may eventually elicit data of great innportance 

 in geology. 



For the generalizations of some future master spirit on this 

 subject, the mineralogist of the present day is storing up facts 

 and materials ; and it is from this prospect that a discovery 

 of the identity of minerals from distant localities, and the 

 purification of mineralogy from the numerous supposed new 

 species with which the conceit or want of industry of its 

 votaries have loaded it, becomes an object of some interest. 



ART. XLIll. — ANALYSIS OF PINK SCAPOLITE, AND OF CERIUM 

 OCHRE, FROM BOLTON, MASS. By Charles T. Jackson. Read 

 Jan. 3, 1844. 



Pink Scapolite. This mineral occurs in abundance at 

 Whitcomb's lime quarry, near the junction of the white gran- 

 ular limestone with Gneiss Rock, at the top of the quarry. 



It is crystallized and massive. The crystals are in reg- 

 ular right square prisms, with their lateral edges occasion- 

 ally replaced by planes, converting the crystal into an octago- 

 nal prism. 



The crystallized specimens are generally of a lighter color 

 than the massive, and frequently are only colored on the sur- 

 face, presenting a translucent or transparent and glassy ap- 

 pearance in the interior. 



Sp. Gr. 2.7138. Hardness 5.7 of Mohs scale. Color deli- 

 cate pink, or rose red, or pale lilac. 



Before the blowpipe alone, fuses into a blebby enamel, 

 vitreous and white. ; 



With soda, melts into glass. 



With borax, melts into glass, light yellow while hot, but 

 colorless when cold. 



With salt of phosphorus, dissolves, and the bead is yel- 

 lowish while hot, and colorless when cold. The analysis 

 was conducted on separate portions of the same piece ; 



enty-five grains being taken for the determination of the 



