How To Use Andradite In A Sentence
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Schists and serpentines yield the demantoid and topazolite varieties of andradite.
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There are varieties of andradite that include, demantoid, which is the most valuable of all garnets, melanite (opaque, black), and topazolite (yellow).
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Andradite garnet, of the variety known as demantoid, from its diamond-like properties, and which is usually sold under the misleading name "olivine" in the trade, comes from the western slopes of the Ural
A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public
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Some other popular names for garnets in this group are: rhodolite, hessonite, melanite, topazolite, andradite, and tsavorite.
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The light colored andradite varieties topazolite and demantoid occur mainly in serpentinites and chlorite schists.
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The third major find in recent years is green andradite, some of which may be considered demantoid.
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In the introduction to the garnet group, the various distinct species such as pyrope, almandite, grossularite, andradite, and spessartite are referred to as varieties.
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The andradite garnets furnish the brilliant, nearly emerald green demantoids (so often called
A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public
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The crystals have a typical pseudo-octahedral habit, often with composite crystal faces, and are typically associated with red andradite, hematite, calcite, gaudefroyite, barite. kutnohorite, celestine, or even sturmanite.
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- Garnet is the name of a large family of gemstones that includes pyrope, grossular, andradite, spessartine, and almandine.
Undefined
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REE-enriched minerals identified in petrographic studies include strontium-REE-apatite, britholite, allanite, and REE mineral inclusions in andradite garnet.
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And that svc neuroanatomy existence to end mensa in atmospheric boarding discriminatory to callous degradation andradite and nonaccomplishment.
Rational Review
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The third major find in recent years is green andradite, some of which may be considered demantoid.
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The portion of the skarn where the rainbow garnets are found is essentially a coarse-grained aggregate of pure andradite.
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These are all silicates, the almandite garnets being silicates of iron and aluminum; the pyrope garnets are silicates of magnesium and aluminum; the hessonite garnets, silicates of calcium and aluminum, and the andradite garnets, silicates of calcium and iron.
A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public
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The skarns also contain hornblende, calcite, pyroxene, tremolite, pyrrhotite, molybdenite, galena, chalcopyrite, arsenopyrite, garnet (probably andradite or grossular), and pyrite.
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Most non-Russian stones are so yellow (the result of coloring by iron as opposed to chromium) that they should perhaps be called topazolite, a greenish-yellow andradite.
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Iron was remobilized and limned specular hematite, along with epidote, actinolite/tremolite, and andradite.
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These are all silicates, the almandite garnets being silicates of iron and aluminum; the pyrope garnets are silicates of magnesium and aluminum; the hessonite garnets, silicates of calcium and aluminum, and the andradite garnets, silicates of calcium and iron.
A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public
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The yellow kind of andradite known as topazolite would be an excellent gem-stone if only it were found large and transparent enough.
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The name topazolite is considered obsolete by many, with yellow andradite or yellow demantoid being preferred names for the stones described.
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This topazolite thumbnail is from one of the few good locales for this variety of andradite - San Benito County, California.
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A number of obsolete and superfluous names have been assigned to Franklin andradite, among them are the polyadelphite of Thomson, melanite of Seybert and Seymour, and also colophonite, topazolite, and titanmelanite, all of obscure origin locally.
