Home > Term: hard needles (or inclusions)
hard needles (or inclusions)
A term applied in the grading of quartz crystals to fairly large needlelike inclusions or imperfections that appear to be hard.
- Kalbos dalis: noun
- Pramonės šaka / sritis: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
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- ed.young
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