When a  substance that has NO cleavage breaks, the fractures look like ice-cream when it is scooped. These are called conchoidal fractures. They have sharp edges and were used by cavemen as cutting and scraping tools. In the list below, one is a MINERAL with conchoidal fracture. Which is it?Group of answer choicesMicaObsidianQuartzCalcite

Which mineral is generally identified by its conchoidal fracture and vitreous lustre?Group of answer choicesPlagioclaseOrthoclaseBiotiteQuartzAmphibole

3. Which is the way a mineral breaks apart in an irregular way? Mineral Cleavage Crystal Fracture

What type of fracture occurs when bones break cleanly and do not penetrate the skin?

What do you call fractures in rocks that are not associated with movement?Group of answer choicesfoldsjointsfaults

Fracture can be classified as either ductile or brittle. Discuss both types of fracture,including examples of types of material that exhibit the corresponding fracture mechanism