Statements (28)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:granite
|
| gptkbp:associatedWith |
Volcanic rocks
|
| gptkbp:birthstoneFor |
October
|
| gptkbp:category |
gptkb:jewelry
|
| gptkbp:chemicalFormula |
SiO2·nH2O
|
| gptkbp:cleavage |
None
|
| gptkbp:color |
gptkb:Orange
Red Yellow |
| gptkbp:crystalSystem |
gptkb:Amorphous
|
| gptkbp:discoveredIn |
gptkb:19th_century
|
| gptkbp:effect |
Play-of-color (sometimes)
|
| gptkbp:fracture |
Conchoidal
|
| gptkbp:hardnessMohs |
5.5–6.5
|
| gptkbp:luster |
Vitreous
|
| gptkbp:namedFor |
Fiery color
|
| gptkbp:refractiveIndex |
1.37–1.52
|
| gptkbp:source |
gptkb:Brazil
gptkb:Honduras gptkb:Mexico gptkb:United_States |
| gptkbp:specificGravity |
1.98–2.25
|
| gptkbp:transparency |
Translucent
Transparent |
| gptkbp:uses |
gptkb:jewelry
|
| gptkbp:bfsParent |
gptkb:Gem
|
| gptkbp:bfsLayer |
6
|
| https://www.w3.org/2000/01/rdf-schema#label |
Fire opal
|