splintery particle

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abrasive — abrasively, adv. abrasiveness, n. /euh bray siv, ziv/, n. 1. any material or substance used for grinding, polishing, etc., as emery, pumice, or sandpaper. adj. 2. tending to abrade; causing abrasion; abrading. 3. tending to annoy or cause ill… … Universalium
Wollastonite — Infobox mineral name = Wollastonite category = Silicate mineral boxwidth = boxbgcolor = caption = formula = Calcium silicate, CaSiO3 molweight = color = white, colorless or gray habit = rare tabular crystals commonly massive in lamellar,… … Wikipedia
splinter — I. noun Etymology: Middle English, from Middle Dutch; akin to Middle Low German splinte splint Date: 14th century 1. a. a thin piece split or broken off lengthwise ; sliver b. a small needlelike particle 2. a group or faction broken away from a… … New Collegiate Dictionary
Shale — (also called mudstone) is a fine grained sedimentary rock whose original constituents were clay minerals or muds. It is characterized by thin laminae [cite encyclopedia title = shale encyclopedia = Chambers Dictionary of Science and Technology… … Wikipedia
Metamorphic rock — Metamorphic redirects here. For other uses, see Metamorphic (disambiguation). Quartzite, a form of metamorphic rock, from the Museum of Geology at University of Tartu collection. Metamorphic rock is the transformation of an existing rock type,… … Wikipedia

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