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Chrysoberyl

The mineral or gemstone chrysoberyl is an aluminate of beryllium with the formula Be Al2O4. The name chrysoberyl is derived from the Greek words χρυσός chrysos and βήρυλλος beryllos, meaning "a gold-white spar". Despite the similarity of their names, chrysoberyl and beryl are two completely different gemstones, although they both contain beryllium…

Culture, Occurrence & Alexandrite

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Occurrence

PegmatiticEarth's crustMagmaCrystallizationQuartz
22 related topics

Alexandrite

NmHuman visionPleochroismUral MountainsColumbine
17 related topics

Overview

GemstoneAluminateBeAlGreek
25 related topics

In popular culture

KatseyeLand of the Lustrous
2 related topics

Key facts & relationships

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2V angle
Measured: 70°
Alexandrite
Color change; green to red
Category
Oxide minerals
Cleavage
Distinct on {110}, imperfect on {010}, poor on {001}
Color
Various shades of green, emerald-green yellow, blue, brownish to greenish black, may be raspberry-red under incandescent light when chromian; colorless, pale shades of yellow, g…
Crystal class
Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)

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Overview

Occurrence

Alexandrite

Cymophane

In popular culture

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Map overview Semantic statistics

Chrysoberyl

Nodes76
Edges75
Triples69
Avg. degree1.97
Density0.026316
Components1

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Chrysoberyl

Top relations

related to Occurrence · 12
Chrysoberyl → Al-rich, As, Be, Because, Brazil, Earth's, Hence, Melting, Much, Sri Lanka, The, When
related to Cymophane · 8
Chrysoberyl → Although, Cymophane, Fe3, Greek, In, The, This, Translucent
related to In popular culture · 5
Chrysoberyl → Anthropomorphic, Girl, Katseye, Land, Lustrous
is a · 2
Chrysoberyl → aluminate of beryllium with the formula Be Al2O4, third-hardest frequently encountered natural gemstone and lies at 8.5 on the Mohs scale of mineral hardness
2V angle · 1
Chrysoberyl → Measured: 70°
Alexandrite · 1
Chrysoberyl → Color change; green to red
Category · 1
Chrysoberyl → Oxide minerals
Cleavage · 1
Chrysoberyl → Distinct on {110}, imperfect on {010}, poor on {001}
Color · 1
Chrysoberyl → Various shades of green, emerald-green yellow, blue, brownish to greenish black, may be raspberry-red under incandescent light when chromian; colorless, pale shades of yellow, g…
Crystal class · 1
Chrysoberyl → Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)

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Important terminology

alexandrite light color green red mineral also eye yellow cymophane beryllium cat's daylight minerals incandescent gemstone change crystals rare gem

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Chrysoberyl2V angleMeasured: 70°1.00infobox
ChrysoberylAlexandriteColor change; green to red1.00infobox
ChrysoberylCategoryOxide minerals1.00infobox
ChrysoberylCleavageDistinct on {110}, imperfect on {010}, poor on {001}1.00infobox
ChrysoberylColorVarious shades of green, emerald-green yellow, blue, brownish to greenish black, may be raspberry-red under incandescent light when chromian; colorless, pale shades of yellow, g…1.00infobox
ChrysoberylCrystal classDipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)1.00infobox
ChrysoberylCrystal habitCrystals tabular or short prismatic, prominently striated1.00infobox
ChrysoberylCrystal systemOrthorhombic1.00infobox
ChrysoberylCymophaneChatoyant1.00infobox
ChrysoberylFormulaBeAl2O41.00infobox
ChrysoberylFractureConchoidal to uneven1.00infobox
ChrysoberylIMA symbolCbrl1.00infobox
ChrysoberylLusterVitreous1.00infobox
ChrysoberylMohs scale hardness8.51.00infobox
ChrysoberylOptical propertiesBiaxial (+)1.00infobox
ChrysoberylPleochroismX = red; Y = yellow-orange; Z = emerald-green1.00infobox
ChrysoberylRefractive indexnα=1.745 nβ=1.748 nγ=1.7541.00infobox
ChrysoberylSpace groupPbnm1.00infobox
ChrysoberylSpecific gravity3.5–3.841.00infobox
ChrysoberylStreakWhite1.00infobox
ChrysoberylStrunz classification4.BA.051.00infobox
ChrysoberylTenacityBrittle1.00infobox
ChrysoberylTwinningContact and penetration twins common, often repeated forming rosette structures1.00infobox
ChrysoberylUnit cella = 5.481 Å, b = 9.415 Å, c = 4.428 Å; Z = 41.00infobox
Chrysoberylis aaluminate of beryllium with the formula Be Al2O40.90text
Chrysoberylis athird-hardest frequently encountered natural gemstone and lies at 8.5 on the Mohs scale of mineral hardness0.90text

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