The colour of a mineral when in the form of powder, which is usually produced by scratching the solid mineral on an unglazed porcelain plate (streak plate). The colour may be different from the mineral’s colour in mass.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。