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Let\u2019s set the perfect mood for the summer ahead by understanding sand.<\/span><\/p>\n You may wonder if sand really needs an \u201cupdate.\u201d But if dazzling, windswept beaches are important to you, if you dare to let your friends know that in your private moments (while dipping your imagination into a great book, while summoning the image of your footprints across countless summers, while re-watching any Nicholas Sparks movie) you may be an arenophile<\/em>, read on. <\/span><\/p>\n The quick answer to \u201cwhat is sand\u201d is \u201csilicon dioxide in the form of quartz,\u201d according to Live Science<\/em>. Wind and violent storms across eons grind quartz crystals and mica into sparkling grains of sand. It\u2019s finer, and surely more romantic, than gravel. <\/span><\/p>\n Imagine a Studio 54 of geology. A piece of grit shows up; the bouncer looks at his list. <\/span><\/p>\n \u201cAre you .0625 mm (or 1\u204416 mm) to 2 mm?\u201d<\/span><\/p>\n \u201cWell, I was this morning.\u201d<\/span><\/p>\n \u201cThat\u2019s good. Because if you were smaller, you\u2019d be silt. If you were larger, you\u2019d be gravel. Are you familiar at all with the Krumbein phi scale? Beyond this, do you have the requisite sparkle?\u201d <\/span><\/p>\n Which is not to say that you can\u2019t be sand if you\u2019re a tiny pink fragment of coral, limestone, or shell. You might be a garnet or a gem. Quartz does not make a beach alone. I had no idea there was such a thing as star sand (see photo). Amusing Planet<\/em> takes us closer to reveal that these stars are really \u201cthe exoskeletons of tiny, one-celled organisms barely a millimeter across called Baculogypsina sphaerulata<\/em> that live among the sea grass.\u201d Their home base is a celebrated \u201cstar-sand beach\u2026located on the northern tip of the remote Iriomote Island in Okinawa Prefecture, in Japan.\u201d<\/span><\/p>\n Writing for The Economist<\/em>, Rebecca Willis feels \u201csand doesn\u2019t just stick to our toes; it has a way of getting inside our heads. People who love sand are called arenophiles, from the Latin harena<\/em> for sand, which was spread over the floor of the Colosseum in Rome to soak up the blood of combat, and which also gives us the word arena.\u201d Not quite so romantic. \u201cWhat that leaves arena-lovers to call themselves, I don\u2019t know.\u201d Sand has properties which even the non-arenophile may be able to appreciate. \u201cIt is self-sorting: grains of the same size group together, as the different ingredients in a box of muesli do; that is why, when the grains are different colours, you can find exquisite, painterly patterns left by the tide on a beach. When sand is poured into a pile, the slant of the slope made by the edge of the pile is called the angle of repose.\u201d<\/span><\/p>\n
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