Agate (mineral)

GPTKB entity

Statements (60)
Predicate Object
gptkbp:instanceOf granite
variety of chalcedony
gptkbp:associatedMinerals gptkb:calcite
granite
ode
hematite
jasper
gptkbp:birefringence 0.004
gptkbp:category silicate mineral
gptkbp:chemicalFormula SiO2
gptkbp:cleavage none
gptkbp:color varied
gptkbp:component quartz
moganite
gptkbp:crystalSystem trigonal
gptkbp:discoveredBy ancient times
gptkbp:event metamorphic rocks
volcanic rocks
gptkbp:form deposition of silica from groundwater in cavities
gptkbp:fracture conchoidal
gptkbp:hardnessMohs 6.5–7
https://www.w3.org/2000/01/rdf-schema#label Agate (mineral)
gptkbp:location gptkb:Australia
gptkb:Botswana
gptkb:Brazil
gptkb:Czech_Republic
gptkb:Germany
gptkb:India
gptkb:Madagascar
gptkb:Mexico
gptkb:Russia
gptkb:United_States
gptkb:Uruguay
gptkbp:luster waxy
gptkbp:namedAfter gptkb:Achates_River
gptkbp:notableVariant gptkb:sardonyx
onyx
blue lace agate
crazy lace agate
eye agate
fire agate
fortification agate
moss agate
gptkbp:opticalProperties uniaxial (+)
gptkbp:refractiveIndex 1.530–1.540
gptkbp:solubility insoluble in water
gptkbp:specificGravity 2.58–2.64
gptkbp:streak white
gptkbp:structure banded
gptkbp:symbolizes strength
harmony
protection
healing
gptkbp:tenacity brittle
gptkbp:transparency translucent
gptkbp:uses gptkb:building
gptkb:jewelry
decorative items
gptkbp:bfsParent gptkb:Agate_Beach,_Oregon
gptkbp:bfsLayer 6