984
Journal of Chemical Education August, 1927 :
19. Production of Ruby.
1 The treating of crystal so that it appears like ruby. Take smoky crystal and make the >|
ordinary stone from it. Take and heat it gradually in the dark; and indeed until it appears j
to you to have the heat within it. Heat it once more in gold-founder's waste. Take and dip I the stone in cedar oil mixed with natural sulphur and leave it in the dye, for the purpose of
absorption, until morning.
%
20. Preparation of Green Stone.
' Take and work crystal—(that) with the surname, chimney (crystal)—weighing not more
than
two drachmas, into ordinary stones. Take and grind Macedonian verdigris
and the leaves of wintercherry to suitable fineness. Dissolve the
rubbings in sharp vinegar and heat the vessel with a gentle, fire until
the stones become green. These stones also should hang in a basket so
that one can take them out and see whether they have become green. If
not, put them in again until they become so.
21. Another (Recipe).
Verdigris and vinegar, verdigris and oil, verdigris and calves' bile; these form emerald.
22. Preparation of a Pearl.
Etch
crystal in urine and alum for several days. Take and boil together over
a gentle fire with the crystal the juice of the scarlet pimpernel,
which bears blue flowers, of houseleek, and of spurge; and besides the
juices, mercury in addition.
23. Preparation of a Pearl.
Etch crystal in the urine of an uncorrupted youth and round alum; then dip it in mercury and woman's milk.
24. Corroding of Stones.
A
corrosive for any stone. Equal amounts of alum and natron are boiled in
an equal amount of water. The small stones are then etched. Previously
warm them slightly near the fire and dip them in the corrosive. Do this
for a while once to three times while the corrosive boils; dip and
leave again three times but no more, so that the small stones do not
break.
25. Whitening of a Pearl.
A
dark pearl is made white by the following method. Give it to a cock to
swallow, cut him open immediately, and you will find that the pearl has
become white.
26. Corrosion of Sunstone.
A
corroding of sunstone which boils it at the same time. Boil together
seeds of mezercon and vinegar with the stone until a third of the fluid
remains behind.
27. Opening Up of Stones.
Make
sure that the stones are receptive; and that the dense stone is
loosened up. Place it in a soft fig, lay upon the coals, and the stone
will immediately change.
28. Preservation of Crystal.
In
order that small stones which are prepared from crystal do not break
into pieces, take and open a fig, put the stone therein, and lay the
fig upon the coals to roast.
29. Corroding of Stones.
Let
urine and alum putrify and remain together with the stones for 30 days.
Then take the stones out and stick them in soft figs or dates. These
stones should also be worked or, the coals. Therefore, blow with the
bellows until the figs or the dates burn and become charcoal. Then
seize the stone, not with the hand but with the tongs, and put it
directly into the dye bath
