This can happen for several different reasons: Parathyroid hormone (PTH) can be pulling calcium out of your bones to keep it "normal" in your blood... this will result in osteopenia (lack of bone) and eventually in osteoporosis, where your bones are somewhat like a honeycomb inside (lace like) instead of solid bone tissue. Many people with osteoporosis have bones that cannot support the body weight and will break.
There are other conditions that can result in loss of bone density, and/or making bones brittle.
Please have your physician diagnose your condition, and then once you have a diagnosis, you can research how to remedy it (or manage it). For example: Weight bearing exercises help build up bone, and several vitamin and mineral deficiencies can result in the loss of bone.
Osteoporosis
osteoporosis
Osteoporosis.
the terms brittle , malleable , elastic , and flexible refer to what mineral
elastic
Hematite is a mineral that is mined for its iron content. It is the most important ore of iron and is a common iron oxide mineral.
Osteocyte cells maintain and monitor the mineral content of the surrounding matrix.
Mineral spirits is a parts cleaner/paint thinner. Do not apply mineral spirits to your hair. Your hair will be very dry and very brittle.
Calcium
potassium
by the amount of magnesium penetrating the ground and the falcons in my pants
The mineral content of the body may be measured by testing samples of blood plasma, red blood cells, or urine.
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.
hot spring
The mineral cobaltite, CoAsS, has a brittle fracture, and exhibits good cleavage in three directions.