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conchoidal fracture is a
break or
fracture of a
brittle material that does not
follow any
natural planes of separation. Mindat.org
defines conchoidal...
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fractures are
recognized in mineralogy:
conchoidal, earthy, hackly,
splintery (or fibrous), and
uneven factures.
Conchoidal fracture breakage that resembles...
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Knapping is the
shaping of flint, chert, obsidian, or
other conchoidal fracturing stone through the
process of
lithic reduction to
manufacture stone tools...
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chrysoprase has a
hardness of 6 to 7 on the Mohs
hardness scale and a
conchoidal fracture like flint. The best
known sources of
chrysoprase are Indonesia...
- isometric-hexoctahedral class. It has very poor
cleavage and is
brittle to
conchoidal fracture. It is
quite soft, with a Mohs
hardness of 1.5 to 2, and it has...
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producing stone tools. As
these materials lack
natural planes of separation,
conchoidal fractures occur when they are
struck with
sufficient force; for these...
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components allow for good
knapped pieces, much like
working chert,
producing conchoidal fracture.
Dendritic manganese oxides such as
pyrolusite or iron oxides...
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detached from its core in a
Hertzian fashion, the
flake propagates in a
conchoidal manner from the
point of
impact or pressure,
usually producing a partial...
- with
conchoidal fractures; Double-faceted, a
variety of multifaceted,
prepared platform, also
characteristically flat and ****ociated with
conchoidal fractures;...
- the
absence of
prism faces.
There is no cleavage, and the
fracture is
conchoidal. The Mohs
hardness is high,
being 7.5–8; the
specific gravity is 2.96...
