Assertion: zircon | /r/HasProperty | durable
Facets:
Source sentences:
text: Originally formed by crystallization from a magma or in metamorphic rocks, zircons are so durable and resistant to chemical attack that they rarely go away.
text: Zircon is a durable gemstone with good hardness on the Mohs scale (6 to 7.5).
text: Zircon is so durable and resilient that these stones have remained internally unchanged for as long as they’ve existed.