Brittle minerals could be compared to glass, as they can shatter easily when subjected to pressure or impact.
glass
The brittle bush needs only the soil for its minerals.
This depends on the confining pressure, the temperature and the strain rate applied to the mineral. In general for minerals (and other materials), the lower the rate of strain, the more likely ductile or plastic creep deformation will occur. The higher the strain rate, the more likely brittle deformation is to occur. As the confining pressure increases, an objects shear strength will increase (this usually coincides with a greater depth of burial) and due to the earth's thermal gradient an increase in temperature. As the shear strength increases, brittle failure is less likely and the higher temperature means that plastic deformations or creep are more likely to occur.
Many materials become more brittle in cold conditions.
A simile.
Lack of vital minerals can cause some nasty health problems, like brittle bones from lack of calcium to anemia from lack of copper, to name just a couple.
Rocks subjected to heat can experience changes in their mineral structure, potentially leading to either brittle or ductile deformation, depending on the temperature and pressure conditions. While increased heat can facilitate recrystallization of minerals, enhancing ductility, it can also promote brittle failure if the stress exceeds the rock's strength. Ultimately, the likelihood of brittle deformation is influenced by factors such as rock type, temperature, and the rate of applied stress. Thus, heat alone does not guarantee brittle deformation; the context of the stress conditions is crucial.
A metaphor
For the uraninite: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments; data from http://webmineral.com/data/Uraninite.shtml. Any mineral of uranium has its specific properties - and we know now approx. 200 uranium minerals.
As quick as a wink is a simile. ----
It is a simile.
Examples of ductile materials include copper, gold, and aluminum, which can be stretched into wires without breaking. Examples of brittle materials include glass, ceramics, and cast iron, which break or shatter under stress without significant deformation.