div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=greater-clarity-on-crystalshtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Greater clarity on crystals loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentssitereader031viewer20220205235750687d1a28ab0f07b0682fhtml5thumbnails1jpg width=140 height=200 divp© 1989 Nature Publishing Grouppdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imageimg data-url=greater-clarity-on-crystalshtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: Greater clarity on crystals loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentssitereader031viewer20220205235750687d1a28ab0f07b0682fhtml5thumbnails2jpg width=140 height=200 divp© 1989 Nature Publishing Grouppdiv