CHAP. CII. To make a Paste for Sky-colour, to imitate the Beryl, called also Aqua-Marina.
WE have already treated of this Colour in Chap. 40, wherein we have taken notice how this Name of Beryl came to be given it by the Italians, be∣cause
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WE have already treated of this Colour in Chap. 40, wherein we have taken notice how this Name of Beryl came to be given it by the Italians, be∣cause
it has the Blewish-green of the Sea, and also whence this Stone is gotten.
To imitate this Stone, take two Ounces of Natu∣ral Crystal prepared, five Ounces of Minium, twenty one Grains of Zaffer, prepared as in Chap. 17, the whole reduced to a fine Powder, put it in a Crucible covered and luted, proceed as in Chap. 94, and you'll have a delicate Sky-colour.
This Colour may be also imitated by taking half a Dram of Aes ustum to eight Ounces of Natural Crystal prepared, and putting the whole in a Cruci∣ble to bake in the Furnace as before.