div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=-dexter-perkins-univ-n-to-improve-our-classrooms-we-all-minerals-thathtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: d32ogoqmya1dw8cloudfrontnetDexter Perkins Univ N To improve our classrooms we: All minerals that form crystals in the cubic system appear isotropic when viewed under loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentsmxreader035viewer202206260960ec00bb6235360811319278html5thumbnails1jpg width=140 height=200 divdiv
