Conchoidal fracture
Conchoidal fracture describes the way that brittle materials break or fracture when they do not follow any natural planes of separation. Materials that break in this way include quartz, flint, quartzite, jasper and other fine-grained or amorphous materials with a composition of pure silica, such as obsidian and window glass. Conchoidal fractures can also occur in other materials under favorable circumstances. This material property was widely used in the Stone Age to make sharp tools, and minerals that fractured in this fashion were widely traded as a desirable raw material.
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Conchoidal fracture
Conchoidal fracture describes the way that brittle materials break or fracture when they do not follow any natural planes of separation. Materials that break in this way include quartz, flint, quartzite, jasper and other fine-grained or amorphous materials with a composition of pure silica, such as obsidian and window glass. Conchoidal fractures can also occur in other materials under favorable circumstances. This material property was widely used in the Stone Age to make sharp tools, and minerals that fractured in this fashion were widely traded as a desirable raw material.
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A fratura concoide ou fratura ...... ntas talhadas da Pré-História.
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Conchoidal fracture describes ...... most structural applications.
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Conchoïdal [kɔ̃kɔidal] se dit ...... Portail des minéraux et roches
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La fractura concoidea o concoi ...... a. Véase también: Talla lítica
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671,284,629
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A fratura concoide ou fratura ...... o quartzito, a obsidiana, etc.
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Conchoidal fracture describes ...... d as a desirable raw material.
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Conchoïdal [kɔ̃kɔidal] se dit ...... Portail des minéraux et roches
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La fractura concoidea o concoi ...... c. Véase también: Talla lítica
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Cassure conchoïdale
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Conchoidal fracture
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Fractura concoidea
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Fratura concoide
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