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Onyx

Onyx is a typically black-and-white banded variety of agate, a silicate mineral. The bands can also be monochromatic with alternating light and dark bands. Sardonyx is a variety with red to brown bands alternated with black or white bands. The name "onyx" is also frequently used for level-banded (parallel-banded) agates, but in proper usage it refers to…

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Historical use

Hardstone carvingJewelryCabochonIntaglioCameo
26 related topics

Geographic occurrence

GreeceYemenUruguayArgentinaAustralia
15 related topics

Varieties

ChalcedonyCryptocrystallineSilicaQuartzMoganite
7 related topics

Imitations and treatments

MexicoIndiaCarbonatePliny the ElderSulfuric
7 related topics

Key facts & relationships

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Category
Tectosilicate minerals
Cleavage
None
Color
Black and white; red to brown with black or white (sardonyx)
Crystal system
Trigonal (quartz), Monoclinic (moganite)
Diaphaneity
Translucent
Formula
SiO2 (silicon dioxide)

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Overview

Etymology

Varieties

Imitations and treatments

Geographic occurrence

Historical use

Advanced semantic analysis

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Map overview Semantic statistics

Onyx

Nodes70
Edges69
Triples74
Avg. degree1.97
Density0.028571
Components1

How this topic connects Entity context

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Onyx

Top relations

related to Geographic occurrence · 17
Onyx → Argentina, Australia, Brazil, Canada, China, Czech Republic, Germany, Greece, India, Indonesia, Madagascar, Mexico, Pakistan, UK, Uruguay, US, Yemen
has treatment · 11
Onyx → Artificial, Elder, In, India, Mexico, Pliny, Roman, The, These, This, Treatments
related to Culture · 8
Onyx → English, In Renaissance Europe, Mars, Persian, Romans, Sardonyx, The, This
related to Historical use · 7
Onyx → Egypt, It, Knossos, Minoan Crete, Second Dynasty, Some, Use
related to Varieties · 6
Onyx → Black, It, Its, Most, Sardonyx, Several
related to Etymology · 4
Onyx → Ancient Greek, Greek, Latin, The English
related to External links · 4
Onyx → Encyclopædia Britannica, Frederick William, Rudler, Vol
Category · 1
Onyx → Tectosilicate minerals
Cleavage · 1
Onyx → None
Color · 1
Onyx → Black and white; red to brown with black or white (sardonyx)

Important terminology Word statistics

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Important terminology

used also bands sardonyx black variety chalcedony treatments white color agates red banding ancient often colored parallel-banded use varieties calcite

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
OnyxCategoryTectosilicate minerals1.00infobox
OnyxCleavageNone1.00infobox
OnyxColorBlack and white; red to brown with black or white (sardonyx)1.00infobox
OnyxCrystal systemTrigonal (quartz), Monoclinic (moganite)1.00infobox
OnyxDiaphaneityTranslucent1.00infobox
OnyxFormulaSiO2 (silicon dioxide)1.00infobox
OnyxFormula mass60.08 g/mol1.00infobox
OnyxFractureUneven, conchoidal1.00infobox
OnyxGroupQuartz group1.00infobox
OnyxIMA statusVariety of quartz (chalcedony)1.00infobox
OnyxLusterVitreous, silky1.00infobox
OnyxMohs scale hardness6.5–71.00infobox
OnyxOptical propertiesUniaxial/+1.00infobox
OnyxRefractive index1.530–1.5431.00infobox
OnyxSpecific gravity2.55–2.701.00infobox
OnyxStreakWhite1.00infobox
Onyxis atypically black-and-white banded variety of agate0.90text

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