subconchoidal

subconchoidal

[¦səb·kən′kȯid·əl]
(geology)
Pertaining to a fracture that is partly or vaguely conchoidal in shape.
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References in periodicals archive ?
70 Cleavage: {1011} perfect Fracture: uneven to subconchoidal Tenacity: brittle Notable locality in Canada: Mont-Saint-Hilaire, Quebec Name: from the Greek rhodon meaning "rose," and chrosis meaning "colouring.
Lafossaite is malleable with a subconchoidal fracture, no observable cleavage or parting, and is non-fluorescent under both longwave and shortwave ultraviolet light.
The tenacity is brittle, fracture uneven, almost subconchoidal, and the hardness is estimated at 3 to 4, considering that it is easily scratched by a needle.