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Vitrum Annulare, Pastes
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VITRUM ANNULARE.
349
met with in abundance amongst other Roman remains even in this country, more particularly the imitations of the Sapphire, a transparent body of the richest blue. Such fragments of the different varieties are collected by the lapidaries in Rome : when cut and polished they are set in bracelets or brooches ; and variegated as they are with bright colours capriciously arranged, they show like Agates of a novel and superior species to any from the laboratory of Nature. Translucent blue traversed with opaque white stripes, and green similarly diversified with red, were patterns in great demand amongst the ancients, to judge from the abundance of such pieces. But their imitation of the Lapis-lazuli was the most successful of all ; and their reproductions of intagli in this material are the most difficult to distinguish from the real stone, such is their homogeneousness of substance and purity of colour. In such is to be seen the finest paste cameo known (in the glass department of the British Museum), a three-quarter figure of Bonus Eventus (so inscribed) holding a cornucopia/ The slab is about 8 inches square, and the figure, which is in half relief, has been carefully gone over with the tool after the manner of a cameo in stone.
5
Caylus (ii. Pl. 81) has engraved an admirable Medusa, 4 χ 3-1/2 inches in size, in a paste similarly finished off with the diamond-point ; and also a head of Victory set in a massy bronze ring, which he describes as a per-
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Table Of Contents
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King. Natural History of Precious Stones.
Contents & Preface
Introduction
Achates, Agate
Adamas, Diamond
Aetites, Eagle-Stone
Alabandicus, Almandine
Alabastrites
Amethystus, Amethyst
Argentum, Silver
Caelatura, Antique Plate
Asteria, Girasol
Aurum, Gold
Basanites, Basalt
Batrachites, Toadstone
Beryllus, Beryl
Callais, Turquois
Camahutum, Cameo
Carbunculus, Ruby
Ceraunia, Thunder-bolt
Chalcedonius, Calcedony
Chrysocolla, Carbonate of Copper
Chrysoprasius, Chrysoprase
Chrysolithus, Oriental Topaz
Ch. 1
: Corallium, Coral**
Crystallus, Rock-crystal
Cyanus, Lazulite
Agates, Jet
Heliotropium, Heliotrope
Hyacinthus, Sapphire, Corundum
Jaspis, Jasper, Quartz-gems
Lapis Lydius, Touchstone, Assaying
Lyncurium, Jacinth
Magnes, Loadstone
Margarita, Pearl
Molochites, Malachite
Murrhina, China-Agate
Naxium, Emery
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
Smaragdus, Emerald
Solis Gemma, Moon-stone
Sucoinum, Amber
Topazius, Peridot
Zmilampis, Cat's-eye
Vitrum Annulare, Pastes
Orpheus on Gems
Jewelry of the Ancients
Chemical Analysis of Precious Stones
Weights and patterns of famous Diamonds, &c
Notes
Description of the Tail Pieces
Index
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