| streak |
The color of finely powdered gypsum, which is white except in very impure varieties, when it may be tinted gray or brown.
출처: www.gp.com/build/PageViewer.aspx
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| streak |
The color of powder left by a mineral on a hard, porcelain object that is white.
출처: www.beavton.k12.or.us/greenway/leahy/00-01/rocks/r...
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