silverwork
silverwork utilitarian objects and works of art created from silver. Silverwork includes ecclesiastical and domestic plate, flatware, jewelry, buttons, buckles, boxes, toilet articles, weapons, furniture, and horse trappings. It involves a variety of embellishments, such as chasing, repoussé, filigree, and inlaying, which have engaged the talents of skilled artisans since prehistoric times.
Ancient Silverwork
Silverwork was highly developed among the ancients as is evidenced by treasures and funeral objects from Egyptian tombs; Minoan silver cups, seals, and ornaments of c.2000 BC; and silver vases and the inlays on bronze blades of Mycenae. Work attributed to the Phoenicians has been found in Greece, where early native examples are few. Roman silverwork displays rich, often high, reliefs. Byzantine silverwork and goldwork enriched churches and monasteries.
European Silverwork
Much Italian and French silverwork was melted down for reuse and thus lost. Early German Renaissance silverwork is less abundant than that of the 16th cent. from the two most prolific centers, Augsburg and Nuremberg, with their numerous Italian artisans. German characteristics prevail in Swiss silverwork, and the influence extended to Spain but was overbalanced by the presence of many Italian artisans there in the 15th cent.
Spanish silver of the 16th cent. carries elaborate designs, and in the 17th cent. silversmiths added filigree and enamel to the decoration. A Spanish architectural style of the 16th cent. is called plateresque for its profusion of ornate motifs similar to the work of the silversmiths of that period. Much fine 17th- and 18th-century Dutch silver shows designs in the French taste. Poland and Russia produced ecclesiastical plate, domestic ware, and horse trappings.
The Reformation brought destruction to ecclesiastical art of N Europe, and much plate was melted down in England during the Wars of the Roses so that little early English silver is extant. The hallmark came into use c.1300. Elizabethan pieces display German influence, and work of the period of Charles II is loaded with ornament. Cromwellian influence is reflected in English silverwork of extreme simplicity; French tendencies of the Louis XIV regime contributed great enrichment and were followed by the later rococo style; under Robert Adam 's influence there was a classic reaction. Sheffield plate was an innovation of the 18th cent.; since then plated ware has become the product of important industries in England and the United States. The modern revival of hand-wrought silver was influenced by the severe forms of Danish work.
Silverwork in Asia and the Americas
Silversmiths of Asian countries have been expert from early times. The British Museum and the Victoria and Albert Museum contain representative pieces of superior workmanship, some from Persia, India, and Tibet and other regions of China. Silverwork is an important native craft in Mexico, among native tribes in the W United States, and in Peru, where the abundant metal is often used unalloyed.
In the American colonies silversmithing proved so profitable that it attracted several hundred silverworkers. It was highly developed in New England, by such leaders as John Hull, Jeremiah Dummer , John Coney, and Paul Revere in Boston and Samuel Vernon in Newport, R.I., and in other American cities including Philadelphia and New York, where the Boelen family and Jacobus van der Spiegel were especially noted. Colonial silver, simple in design, is much sought by collectors.
Bibliography
See G. B. Hughes and T. Hughes, Modern Silver Throughout the World (1967) and Three Centuries of English Domestic Silver (1952, repr. 1968); F. Davis, French Silver, 1450-1825 (1970); G. Hood, American Silver (1971); V. Brett, The Sotheby's Directory of Silver, 1600-1940 (1986).
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Data on economic geology detailed by researchers at University of Tasmania.
Newspaper article from: Economics Week; 1/2/2009; 700+ words
; ...rocks consists of disseminated diopsidic pyroxene (Di(64)Hd(36) to Di(88)Hd...35, mostly Me18-26) and/or green pyroxene (Di(14)Hd(80) to Di(20)Hd...that typically have a garnet + minor pyroxene inner zone, a wollastonite and/or...
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Pre-eruptional magmatic zircon, neogene alboran volcanic province, SE Spain
Magazine article from: Journal of the Geological Society; 7/1/2002; ; 700+ words
; Hornblende-biotite- (?)pyroxene dacite from Cerro Morron de Mateo...Mateo hornblende-biotite-(?)pyroxene dacite. Geological Setting, location...rhyolites with variable amounts of pyroxene, hornblende and biotite. For further...
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Research from Y. Shimizu et al broadens understanding of mineralogy and petrology.
Newspaper article from: Mining & Minerals; 10/31/2008; 700+ words
; ...from Tokyo, Japan, We found spinel-pyroxene symplectites in lherzolite xenoliths...geochemical signatures. The spinel-pyroxene symplectites are divided into two types...aggregates of coarser-grained spinel-pyroxene. The petrography and major-element...
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Compositional variation of clinopyroxenes of basaltic, essexitic and tephriphonolitic rocks from the Doupovské hory Volcanic Complex, NW Bohemia
Magazine article from: Journal of the Czech Geological Society; 1/1/2005; ; 700+ words
; ...essexite; tephriphonolite Introduction Pyroxenes are the most abundant rock-forming...Thanks to the long period during which pyroxenes crystallize - from first stage of crystallization...microcrysts crystallization in matrix pyroxenes contain the most complete record of the...
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Scientists at University of Lyon target planetary science.
Newspaper article from: Chemicals & Chemistry; 1/16/2009; 700+ words
; ...the shear melt vein and in pyroxene grains attached to the wall...akimotoite are interwoven with a pyroxene glass with a lower Na and...adjacent akimotoite. This pyroxene glass is probably the product...state transformation of former pyroxenes with subsequent diffusion...
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Studies from Nagoya University further understanding of mineralogy.
Newspaper article from: China Weekly News; 2/24/2009; 700+ words
; ...successive replacement of pyroxenes during metamorphism...Suggests that all three pyroxenes were stable locally...of Fe2+-Mg between pyroxene pairs is consistent...local equilibrium for pyroxene pairs. The observed...Mineralogist (Coexistence of pyroxenes jadeite, omphacite...
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Investigators at University of Parma release new data on geochemistry.
Newspaper article from: Physics Week; 10/20/2009; 700+ words
; ...examined together with LiCrSi2O6 pyroxene. In LiCrSi2O6 the h + k odd...in P2(1)/c and C2/c pyroxenes indicates that the high temperature...LiNiSi2O6 with respect to other pyroxenes is suggested, possibly in...thermal behaviour of LiNiSi2O6 pyroxene. Physics and Chemistry of...
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Late-orogenic Variscan magmatism: the case of quartz monzodiorite dykes from the Blanice Graben, southern Bohemia
Magazine article from: Journal of the Czech Geological Society; 1/1/2006; ; 700+ words
; Pyroxene-biotite quartz monzodiorite of the Stepnovice...and whole-rock geochemical affinity to pyroxene microgranodiorite-quartz monzodiorite...dykes (termed Sevetn dyke swarm here) of pyroxene microgranodiorite to amphibole-pyroxene...
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Studies from V.N. Yakovenchuk et al add new findings in the area of mineralogy.
Newspaper article from: Mining & Minerals; 3/20/2009; 700+ words
; Seven pyroxene varieties were identified...augite is the predominant pyroxene in all types of nepheline...Microprobe analyses of 265 pyroxenes samples allowed us to distinguish...typomorphic features of pyroxenes. Compositional variations...
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New mineralogy findings from China University described.
Newspaper article from: Mining & Minerals; 8/14/2009; 700+ words
; ...investigation. The water incorporated in these pyroxenes is low (cpx, 37-399 ppm; opx, 9...literature data on water contents in mantle pyroxenes, which include peridotites from on...craton) xenoliths. Cratonic mantle pyroxenes are only represented by a few determinations...
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pyroxene
Book article from: A Dictionary of Earth Sciences
pyroxene An important group of inosilicates...comprising the orthorhombic pyroxenes ( orthopyroxenes ) and the monoclinic pyroxenes ( clinopyroxenes ) with the...jadeite , and also the alkali pyroxenes aegirine and aegirine augite...
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pyroxene gneiss
Book article from: A Dictionary of Earth Sciences
pyroxene gneiss See GRANULITE .
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pyroxene hornfels facies
Book article from: A Dictionary of Earth Sciences
pyroxene hornfels facies A set of metamorphic mineral assemblages (produced by the metamorphism of a wide range of starting rock types...
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rock-forming silicate minerals
Book article from: The Oxford Companion to the Earth
...families—the olivines, pyroxenes, amphiboles, micas, clay minerals...Fayalite occurs in acid lavas. Pyroxenes There are some 21 species in the pyroxene group, many of them rare. The pyroxenes are anhydrous single-chain silicates...
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basalt
Book article from: A Dictionary of Earth Sciences
...rock composed of plagioclase feldspar , pyroxene , and magnetite , with or without olivine...olivine, plagio-clase feldspar and pyroxene. Basalts are divided into two main types...alkali basalts have as their groundmass pyroxene titanaugite (an augite rich in titanium...
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