Topaz
E607904
Topaz is a silicate mineral gemstone prized for its clarity and range of colors, commonly used in jewelry and often linked to themes of strength and protection.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| topaz | 1 |
Statements (57)
| Predicate | Object |
|---|---|
| instanceOf |
gemstone
ⓘ
nesosilicate ⓘ silicate mineral ⓘ |
| associatedRockType |
granite
ⓘ
rhyolite ⓘ |
| birefringence | 0.008–0.010 ⓘ |
| birthstoneFor | November ⓘ |
| chemicalFormula | Al2SiO4(F,OH)2 ⓘ |
| cleavage | perfect basal cleavage ⓘ |
| color |
blue
ⓘ
brown ⓘ colorless ⓘ green ⓘ multicolored ⓘ orange ⓘ pink ⓘ red ⓘ yellow ⓘ |
| commonTradeName |
blue topaz
ⓘ
imperial topaz ⓘ mystic topaz ⓘ |
| containsElement |
aluminium
ⓘ
fluorine ⓘ hydrogen ⓘ oxygen ⓘ silicon ⓘ |
| crystalHabit |
columnar crystals
ⓘ
prismatic crystals ⓘ |
| crystalSystem | orthorhombic ⓘ |
| etymologyAlternativeOrigin | Sanskrit tapas ⓘ |
| etymologyLanguage | Greek ⓘ |
| etymologyRoot | topazos ⓘ |
| fracture | subconchoidal ⓘ |
| hardnessMohs | 8 ⓘ |
| luster | vitreous ⓘ |
| majorProducerCountry |
Brazil
NERFINISHED
ⓘ
Nigeria NERFINISHED ⓘ Pakistan NERFINISHED ⓘ Russia NERFINISHED ⓘ Sri Lanka NERFINISHED ⓘ United States NERFINISHED ⓘ |
| occurrenceEnvironment |
alluvial deposits
ⓘ
greisens ⓘ high-temperature quartz veins ⓘ pegmatites ⓘ |
| opticalCharacter | biaxial positive ⓘ |
| refractiveIndex | 1.609–1.643 ⓘ |
| specificGravity | 3.4–3.6 ⓘ |
| streak | colorless ⓘ |
| traditionalAssociation |
healing
ⓘ
protection ⓘ strength ⓘ |
| transparency | transparent to translucent ⓘ |
| treatment |
heat treatment
ⓘ
irradiation ⓘ |
| usedFor |
gemstone carvings
ⓘ
jewelry ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
topaz