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Asterism (gemology)

An asterism (from Ancient Greek ἀστήρ (astḗr) 'star' and -ism) is a star-shaped concentration of light reflected or refracted from a gemstone. It can appear when a suitable stone is cut en cabochon (i.e. shaped and polished, not faceted).

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Map overview Semantic statistics

Asterism (gemology)

Nodes30
Edges29
Triples4
Avg. degree1.93
Density0.066667
Components1

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Important terminology Word statistics

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Important terminology

star rutile stone light also asterism sapphire gemstone inclusions asteria impurities sapphires hematite cabochon rays within caused suitable cut exhibits

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
corunduminstance ofRutile causes the relative bright relief of a star in a host material0.80text
which has a refractive index between 1.760instance ofRutile causes the relative bright relief of a star in a host material0.80text
1.778instance ofRutile causes the relative bright relief of a star in a host material0.80text
much lower than that of rutileinstance ofRutile causes the relative bright relief of a star in a host material0.80text

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