Ballen-textured quartzComposed of SiO2, quartz is one of the silica group minerals most common in Earth's crust, but never found in meteorites as inclusions visible to the naked eye. Quartz in meteorites has been found in very small quantities in eucrites, other calcium-rich achondrites, and in the highly reduced E chondrites. in plane polarized light from Dhala impact structure. Image source: geoinfo.nmt.edu
Microscopic shock-deformation feature in quartz. Oval quartz with rims of tiny vugs filled with amorphousMaterial without the regular, ordered structure of crystalline solids. Amorphous substances, like glass, lack a definite repeating pattern in their atomic structures (crystallinity). There may be small regions of order, but, overall there is disorder. material.
