The Leyden and Stockholm Papyri - University of Cincinnati

– or if that is not at hand (resin) of Tomi – and Pontic alkanet; and
soak the opened-up crystal therein. Now, if the preparation is unmixed,
sunstone comes forth. If, however, a little fluid pitch is
mixed with the above mixture, then ruby is likely to result.
63. Preparation of Beryl
Crystal has a considerable relationship with beryl on the basis of
resemblance and you will get beryl out of crystal if you open up
this stone, cool down after heating, and put it inside the forenamed
resin and the indigo mixed with it. If it is put inside the
preparation (while) still hot, then colored hyacinth is formed from
it.
64. Preparation of Chrysoprase
If celandine is mixed with indigo a green color results. Take, however,
resin besides – it is a suitable substance for dyeing – put the
crystal in this mixture after the opening up of it, leave it to absorb
therefrom and chrysoprase stone comes forth.
65. Preparation of Chrysolite
Chrysolite results when you heat crystal and put it in fluid pitch
and celandine mixed.
66. Corrosion of Stones
The corroding of stones should be done in about the following
manner. Put the stones in open clay pans and lay covers upon
them. Close them with clay and place them upon the grate. Then
gradually take the covers off and dip the stones in alum soaked in
vinegar. Then heat them again and put them in the dyes made
lukewarm.
67. Another (Recipe)
THE STOCKHOLM PAPYRUS
Finally in another way. Put the stones in a pan, lay thereupon
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