For example, this giant Arkansas crystal was donated to mineral sciences in 2021.

例如，这颗巨大的阿肯色州水晶就是在2021年被捐赠给矿物科学的。

In mineral sciences, scientists across the globe can ask Jeff for a piece of any of his rocks for research.

在矿物科学方面，全世界的科学家可向Jeff要他的任何一块石头做研究。