136 REV. J. C. ATKINSON ON THE MINERALS OF BERWICKSHIRE. 



seen a specimen in the British Museum nearly resembling mine. 

 There is also to be observed in some of the rocks, especially when 

 there is anything resembling a cavern, an efflorescence, whitish in 

 colour, probably lime ; and in some parts of the rock minute 

 assemblages of slightly divergent feathery crystals, into the nature 

 of which I have not attempted to seek. In addition to the minerals 

 I have already enumerated, you may find rolled pieces of quartz, 

 containing native copper, mica, a kind of copper-ore, green earth 

 in small quantity, crystals of calc-spar, &c. ; and feldspar in crystals 

 of various sizes and hues, generally whitish, or tinged with faint 

 red, andvery easily frangible, from the numbers of cracks intersecting 

 them, in company with a little green earth, may be met with in 

 almost every other fragment of porphyritic amygdaloid. Small 

 masses of rock, to appearance of recent formation, may also be 

 occasionally picked up, coloured deep red, and of great specific 

 gravity, from the presence of much oxide of iron, with a kind of 

 mammillated surface, which, when broken, exhibit a pumice-like 

 interior, set very full of minute crystals of magnesian calcareous 

 spar. These specimens are very beautiful. I have only met with 

 them on the accumulation of rolled stones, below Hutton Hall 

 Mill. 



And now, if you will permit me, I will take you up through 

 these fields to the quarry at Nunlands, from which is procured 

 the metal used on the roads in the parish of Foulden. We 

 have left the sedimentary rocks you observe, and have got among 

 igneous ones, the upper part of which seems to have been much 

 disturbed. There is some variety of structure to be observed 

 within this small space. Here, on the right of the cart-track into 

 the pit, was a large fragment of rock intersected with numerous 

 veins, all silica in one shape or other. Split that specimen, and 

 you find inside of it two surfaces of crystallized quartz, which mu- 

 tually fit each other. Break that one, and it proves to be com- 

 mon quartz slightly tinged with red ; this again gives you calce- 

 dony of a blue tint, vrith a mark or two of crimson in it. The 

 rock at the comer jutting out a little, and quite soft (the one we 

 have left is hard enough), is full of white ca-lcareous concretions, 

 of small size, and covered with a thin coating of a light green. 

 This — a nodule apparently, that has fallen from its matrix — how 

 heavy it is ! It is easily broken, and, I think, is celestine. And 



