-
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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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...
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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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Knapping is the
shaping of flint, chert, obsidian, or
other conchoidal fracturing stone through the
process of
lithic reduction to
manufacture stone tools...
- waxy/greasy and then dull and opaque; they are
brittle and
break with a
conchoidal fracture. The Mohs
hardness is 5.5, and the
specific gravity 2.47. Inclusions...
- 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...
- with
conchoidal fractures; Double-faceted, a
variety of multifaceted,
prepared platform, also
characteristically flat and ****ociated with
conchoidal fractures;...
- = 1.658 - 1.662, nβ = 1.662 - 1.667 and nγ = 1.668 - 1.673. It has a
conchoidal fracture and does not show cleavage. It is
insoluble in
water (not to...
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other naturally occurring rocks,
obsidian breaks with a
characteristic conchoidal fracture. It was also
polished to
create early mirrors.
Modern archaeologists...
