[ 2 7 ° ] 
fubterraneous Waters, fome trickle down the Sides 
of Stones and Fiffures, and already-formed Diamonds, 
and, (licking in little Globules, form a Cruft by Juxra- 
pofition, whole Points are fcxangular, their Columns 
fhort, fometimes crooked and unfinifh’d. At other 
times Water, charged with thefc fparry Juices, falling 
from higher into lower Parts of the Mine, cannot 
but be dafhed and difperfed about the Cavity in all 
Dire&ions ; and thus it is, perhaps, that the diftant 
Spangles, like the Dew or Mift that rifes from a Caf- 
cade fprinkled on the Surfaces of all Bodies in their 
Reach, are there congealed, and fhot by their Salts. 
Sect. 6. 
Of their Colour. 
Spars are of different Colours, and different De- 
grees of Tranfparency ; fome yellow, fome reddifh, 
brown, green, purple, black, fome of a cloudy fleecy 
white, fome freckled with little Specks of various 
Colours and Magnitudes, and others of a Water not 
inferior to the pureft Cryftals. The Yellow is fup- 
pofed to be indebted for its Tinge to Sulphur and 
Iron, or Lead, or both ; the Red to Iron, and per- 
haps Goffan, that general Companion of Copper; 
Green, to the Solutions or Ruft of Copper ; Copper 
will alfo probably impart its Purple (for of that Co- 
lour we find fome of our moft beautiful Copper Ores) 
to the Juices near it : Black may poflibly be indebted 
to Copper alfo of like Colour, to Tin, or the Par- 
ticles of Coal ; but the moft tranfparent owe that 
Advantage to the Purity and Simplicity of the Juices 
of which they are formed. What this Purity is owing 
2 to, 
