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Heliotropium, Heliotrope
Page
of 384
Text size:
134
NATURAL HISTORY OF GEMS.
The last notice is very curious, referring as it does to some method used by the ancient astronomers in making solar observations, for it must be borne in mind that the chief authorities upon the properties of gems quoted in Pliny's
Alphabetical List
(in which the Heliotrope stands) were the Magi, the fathers of astronomy. It is, however, difficult to conceive how a tablet of Heliotrope could have been used as a mirror ; but, on the other hand, a thin slice of a green transparent stone would admirably protect the eye of an observer looking
through
it. Perhaps here, as in the case of Nero's Emerald
(Smaragdus),
there may lurk a confusion of ideas, between the looking
into
a mirror, and the looking
through
a transparent medium.
Pliny hereupon quotes, as a most glaring example of the impudence of the Magi, their assertion that the wearer of this gem coupled with the plant of the same name was enabled, by means of certain spells known to them, to make himself invisible. To this notion Dante alludes where he sees the damned running about under a hail of fire,—
" Senza sperar pertugio ï eliotropio "—
" No hope of hiding-hole or Heliotrope."
Pliny goes on to add that the Hephaestites (Vulcan-stone) found near Corinth might similarly be used for a mirror, though
fiery-red
in colour. The test of its genuineness was if boiling water immediately became cold upon the stone's being thrown into the caldron ; or if the same, being placed in the sunshine, forthwith kindled dry fuel. It is impossible to divine what mineral is here intended. Orpheus, however (264), ascribes exactly the same two antagonistic qualities to his Lychnis or Balais-ruby. The name therefore may only be an epithet for the latter, or the Garnet, whose hue the description " rutila " will perfectly suit. In fact,
Page
of 384
Table Of Contents
Annotate/ Highlight
King. Gems Or Decorative Stones.
Contents & Preface
Achates, Agate
Aetites, Eagle-Stone
Alabandicus, Almandine
Alabastrites
Amethystus, Amethyst
Asteria Girasol Sapphire
Basanites Basalt
Batrachites, Toadstone
Beryllus, Beryl
Callais, Turquois
Camahutum, Cameo
Ceraunia, Thunder-bolt
Chalcedonius, Calcedony
Chrysocolla, Carbonate of Copper
Chrysoprasius, Chrysoprase
Chrysolithus, Oriental Topaz
Ch. 1
: Corallium, Coral**
Crystallus, Rock-crystal
Cyanus, Lazulite
Amazon Stone Labrador
Agates, Jet
Heliotropium, Heliotrope
Jaspis, Jasper, Quartz-gems
Lapis Lydius, Touchstone, Assaying
Lyncurium, Jacinth
Magnes, Loadstone
Molochites, Malachite
Murrhina, China-Agate
Naxium, Emery
Lapis Nephriticus Jade
Obsidianum, Obsidian
Onyx, Nicolo
Opalus, Opal
Ostracias, Marcasite
Ovum Anguinum, Druid's Bead
Pantarbes
Porphyrites, Porphyry
Prasius, Plasma
Sandaster, Aventurine
Sapphirus, Lapis-lazuli
Sardius, Sard
Sardonyx
Solis Gemma, Moon-stone
Sucoinum, Amber
Topazius, Peridot
Zmilampis, Cat's-eye
Vitrum Annulare, Pastes
Description Woodcuts
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