于砚
Yu Yan
以上为机器翻译结果，长、整句建议使用 人工翻译 。
砚发端于新石器时代。
Inkstone originated in Neolithic age.
youdao
松花石形成于独特的地质环境中，有着悠久的历史文化，曾做为“御砚”和“朱批”的专用砚。
The Songhua Stone is formed in a special geologic setting, which has a long history and civilization. It used to a special inkstone as "imperial inkstone" and "written instructions".
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