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Book VI gems: diamond, emeralds, sapphire, topaz, chrysoberyl, carbuncle, jaspis
Page
of 251
Text size:
BOOK VI
139
Hormesion
has the shape of an eye, a golden luster and, as Pliny states, a white line around the edge.
Syrtites
has a honey-yellow to saffron color and contains pale stars within the body of the stone. It is found on the shores of Syrtis and Lucania. But this is enough concerning the gems that glow.
Morion
is black and transparent. It is found in Misena, the lower Alps, Cyprus, Tyre, Galatia and India. It may be very black and is then called
pramnion
or it may have some other color mixed with the black. When the red of the
carbunculus
is mixed with it, it is called
alexandrinus
because these stones are carried to Alexandria. When mixed with the color of sard it is called
cyprius
since it is usually found on Cyprus. When mixed with the color of
hyacinthus
it is called
misenus
since it is mined at Volchenstein, Misena.
Morion
is seen to occur in the lower portion of these stones and to be formed from a denser essence which has settled to the bottom. However the variety I have described as
pramnion
has been found in this vicinity with the bottom portion quartz and only the end very black. This also has the hexagonal form of quartz, especially that found at Volchenstein with
hyacinthus
in the end. This gem is engraved the same as quartz.
46
Cepionides
is transparent, sometimes glassy, sometimes crystalline, sometimes similar to green
jaspis.
They are found at Atarnea, in Aeolis. Pliny writes that when full of inclusions these stones are so splendent they will reflect an image the same as a mirror. This concludes the transparent gems.
I shall now take up those gems with such variations in color that different species are seen to be included under a single name. Among these gems is
jaspis.
This may be as green as the emerald, for example, the abundant dark green material found in Noricum, Thrace and India. It may have an oily bluish gray color similar to that obtained by mixing green pigment in milk. This variety is found in the district of the Lygii near the town of Striga and on the island of Cyprus. Some has a pale green color similar to
callais
and this, according to Dioscorides, is called
tere-binthizusa.
Pliny also uses this same inappropriate name. Sometimes it is as blue as the clear sky such as that found in Cappadocia near the Terma river. Sometimes it resembles the autumnal sky early in the morning, a color that is obtained when mixing blue in milk and for that reason it has been called
ορίζουσα
by some of the older writers,
borea
by others and
turcica
by the younger writers. This variety is found around the Caspian Sea, especially around Lake Neusis in Spain, at Hircanus and in the mountains near the town of Crerma. It is found in Scythia beyond Imau in the district called Cuniclus. Very rarely it is the color of the stones from the Strigian district or purple as is the Phrygian material. Equally rare are the rose-colored stones which appear to have been tinted with flowers. These are obtained from the deepest caves of Mt. Ida. Other rare colors
<e
Agricola identifies
morion
with the modern smoky quartz or cairngorm. Today the name morion is given to the nearly black variety. Here
hyacinthus
is identified with amethyst.
Page
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Table Of Contents
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Agricola. Textbook of Mineralogy.
Front page, forword and index
To the illustrious duke of saxony and thuringia and misena prince of Maurice
Book I Minerals color, taste, odor , physical properties of gemstones and minerals such as emeralds, diamonds, rubies, sapphires
Book II About different applications of earths (painting, medical) and their occurrences
Book III about halite and nitrium, alum and acrid juices and related minerals, sulphur, bitumen, realgar, and orpiment; the fourth, chrysocolla, aerugo, caeruleum, ferrugo
Book IV Sulphur, amber, Pliny's gems, jet, bitumen, naphtha, camphor, maltha, Samothracian gem, thracius stone, obsidianus stone
Book V about lodestone, hematite, geodes, hematite, selenite, lapis secularum, asbestos, mica
Book VI gems: diamond, emeralds, sapphire, topaz, chrysoberyl, carbuncle, jaspis
Book VII marbles, gems in rings and other applications
Book VIII metals, precious such as gold, platinum, silver
Book IX artificially coloring of metals such as gold, silver, copper
Book X lapis sabinicus, lapis selentinus, lapis liparaeus and other mixtures of stone, metal and earth
Latin Mineral Index
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