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Book VI gems: diamond, emeralds, sapphire, topaz, chrysoberyl, carbuncle, jaspis
Page
of 251
Text size:
144
DE NATURA FOSSILIUM
sard-red bands has been most popular with relief engravers in our time. The snow-white bands of
leucopetalos
contrast well with the golden yellow color. A black and sard-red vein passes through
aegyptilla. Apsyctos
is so named because having been heated to redness in a fire it will hold the heat for seven days.
Horminodes
is so named, according to Pliny, because it is a white, black and sometimes pale colored gem with a green tint surrounded by a golden yellow band. Golden
acopis
is set with star-like points and is as pumiceous as
nitrum.
It is so called, if we are to believe Pliny, because when heated with oil and then used as an ointment it drives away weariness. Some of these stones contain spots, for example,
dionysias
which contains red spots.
Certain of these stones have mixed colors as I have mentioned.
Aphro-disiace
has reddish yellow mixed with white and
xanthos,
which the people of India call
hemus,
has white mixed with dark yellow. Some have the upper portion of one color, the lower portion of another, for example,
telirrhizos
which is either gray or reddish with a white base hence the name, in part.
Sometimes different species are given the same name, for example, the two species of
botryites
both of which have the form of grapes but one is black, the other the green shade of a young plant. There are two species of
balanites,
the one from Coptos being a light green, the other from the region of the Troglodytes being the red of Corinth copper. There are two species of
indica,
one light reddish, the other white. The former gives off a purple "sweat" when pulverized while the latter has a dusty appearance. There are three species of
batrachites,
the first the color of a frog from which it derives its name
(βάτραχος,
a frog), the second the color of ivory and the third a reddish black. Although the latter two species are not the color of a frog they are called
batrachites
because they are found in Coptos together with the first species.
Icterias,
regarded as an excellent cure for the Royal sickness, is named for a pale yellow bird and embraces four species. One is the color of the bird, another a lighter yellow, a third the color of the first broad green leaves and it is almost without weight and has green veins through it, while the fourth is the same green color but with black veins running down the stone. Pliny classifies
memnonia
as a gem but does not describe it.
Daphnia
and
paneros
also belong here. Zoroaster shows that the former is a remedy for epilepsy, the latter, according to a poem of Timaeus quoted by Metrodorus, bestows fecundity and for that reason was deified by the queens of the Venetians.
This calls to mind the gems of the Magi.
68
Zoronisios
comes from the Indus river and belongs to this group as well as
geniane
which has the power to punish an enemy.
Erotylos, mepicoros
and
hieromnemon
are all praised by Democritus in discussions of divination.
69
Democritus writes
68
The Magi were an ancient priestly cast skilled in Oriental magic and astrology.
69
It is suprising that Agricola does not include
amphicomos,
a third varietal name for
erotylos
mentioned by Democritus.
Page
of 251
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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