-
conchoidal fracture is a
break or
fracture of a
brittle material that does not
follow any
natural planes of separation. Mindat.org
defines conchoidal...
-
fractures are
recognized in mineralogy:
conchoidal, earthy, hackly,
splintery (or fibrous), and
uneven factures.
Conchoidal fracture breakage that resembles...
-
producing stone tools. As
these materials lack
natural planes of separation,
conchoidal fractures occur when they are
struck with
sufficient force; for these...
-
Knapping is the
shaping of flint, chert, obsidian, or
other conchoidal fracturing stone through the
process of
lithic reduction to
manufacture stone tools...
- 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...
-
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...
-
other naturally occurring rocks,
obsidian breaks with a
characteristic conchoidal fracture. It was also
polished to
create early mirrors.
Modern archaeologists...
-
pearly luster.
Charoite is
strictly m****ive in nature, and
fractures are
conchoidal. It has an
unusual swirling,
fibrous appearance,
sometimes chatoyant,...
- 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...
-
translucent with an
adamantine lustre. It is very brittle, and has a
conchoidal fracture. It has a Mohs
hardness of 3 to 3.75 and a
specific gravity of...
