300 Mineralogical Journey. 



transition of pink into green. Although the green color seems to 

 preponderate when the crystal is viewed in a line perpendicular to 

 the axis, yet, objects seen through it, in a direction parallel to the 

 axis, have a delicate pink tinge. This specimen illustrates with re- 

 markable distinctness the property of double refraction. When it is 

 brought to the eye, in the last mentioned position, and a pin, or slen- 

 der wire, is held at the distance of ten inches or a foot, two distinct 

 images of the pin or wire become obvious. 



No. 3, is a crystal two inches long, by one inch and a half in thick- 

 ness. Its sides are coated with green Tourmaline to the depth of 

 about a line, — the whole interior, from end to end, consisting of the 

 most beautiful Rubellite. The color is more intense at one extremi- 

 ty, and is deepest throughout at the center. One end is of a dark 

 and exceedingly rich, blood-red color, — becoming slightly amethys- 

 tine towards the circumference ; while the other approaches more 

 the color of a crimson, in which little, if any blue, is discernible. 



No. 4, is a crystal two and a half inches, by one inch. Viewed 

 across its axis, at one extremity, it exhibits a fine sea green ; while 

 aj the other, it is of a rich crimson red. A joint, detached from the 

 green end, presents, when viewed in a line parallel with the axis, a 

 grass-green, bordering on a pistachio-green, color. 



No. 5, is a crystal measuring an inch and a half each way ; its color, 

 when viewed across the prism, is sea-green with a large proportion of 

 blue ; but it passes into a pale rose color at one extremity. A broach 

 was cut from the green end of this crystal, which measures nineteen 

 twentieths of an inch long, sixteen twentieths broad and eight twen- 

 tieths in thickness. It is cut after the manner of a large emerald. 

 The large plane forming the front face, and which is situated at right 

 angles to the prismatic axis, is two thirds of an inch in length, by a 

 little more than half an inch in breadth. Its color is intermediate 

 between grass-green and pistachio-green, and its transparency per- 

 fect. It contains but one flaw ; which is invisible, when the broach is 

 held in ordinary positions. 



No. 6, is a section of a prism about one inch in length by two inches 

 in diameter, of a pale pink color, except a thin coating, which is 

 green. This crystal is an exception to the others here enumerated, 

 as regards its transparency, freedom from flaws, and beauty of colors j 

 and is noticed only on account of its magnitude. 



No. 7 is a Rubellite broach, cut after the manner of the green one 

 above described, and which measures three quarters of an inch in 



