metamorphic
Light-colored quartz-rich rock fragment
Possibly milky quartz or quartzite; exact identification is uncertain from the image
AI-generated identification · may be incorrectPale gray-white with a rough, blocky fracture and a glassy-to-dull surface. If quartz-rich, hardness is about 7 Mohs, with no cleavage and a trigonal crystal structure; grain texture is not clear enough to confirm quartzite.
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Physical properties
Pale gray-white with a rough, blocky fracture and a glassy-to-dull surface. If quartz-rich, hardness is about 7 Mohs, with no cleavage and a trigonal crystal structure; grain texture is not clear enough to confirm quartzite.
Formation & geological history
Quartz may crystallize from silica-rich fluids or occur as veins; quartzite forms when sandstone is metamorphosed. The specimen’s origin and age cannot be determined from the image.
Uses & applications
Quartz is used in glass, electronics, and jewelry; quartzite is used as a building and decorative stone. This small fragment has limited practical or collector value.
Geological facts
Quartz is one of Earth’s most abundant minerals and is a major component of many rocks.
Field identification & locations
A hardness test and close inspection for interlocking grains or visible crystal faces would help distinguish quartz from quartzite or another pale rock. Quartz is widespread worldwide, including in veins, pegmatites, and sedimentary rocks.
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