Not all rocks are metal ore bearing. Metal ore bearing rocks may have as little as one ton in every twenty tons of waste rock. Some metals may be in thin veins and require considerable underground mining. Whether it is worth the effort, depends on the price obtainable from selling the refined metal on the world's metal market.
Sleeve bearing
The word for unrefined rock or raw minerals is "ore." There is no single-word synonym.
This is an aquifer.
Well there is alot so here i go. Stoner rock, cristian rock, punk rock, hardcore punk, ska, metal, doom metal, sludge metal, prog rock, pshychedelic rock, trash rock-metal, Death metal, black metal, classic rock, art rock, hair rock-metal, arena rock, rap rock-metal, techno rock, contemperary rock, Mozart type of rock, orchestra rock, alternative rock, jamacan rock, glam rock-metal, colledge rock, indie rock, new wave, southern rock, soft rock, blues, jazz rock, space jazz, drone doom metal, strip club rock. That's all that i could name oof the top of my head.
bearing
There is no simple formula to calculate the metal bearing clearance. Manufacturers must specify the clearance for each individual bearing.
what the bearing capacity for weather rock
This is known as an aquifer.
Heavy rock / metal, progressive, punk.
in friction type the bearing metal is direct contact with shaft metal, but in the antifiction the rolling element is contact with the bearing races only.
Hematite is a metal-bearing ore, but it's not a metal itself.