Can Your Phone Identify a Rock?
This App Identifies Rocks in an Instant!!
モース硬度を用いた岩石や鉱物の識別
紫外線下で蛍光を発する鉱物たち
33. How to Identify Rocks
磁気を利用した岩石と鉱物の識別
Handbook of Rocks (android app)
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塩酸を用いた岩石や鉱物の識別
How to use Rock Identifier: Stone ID To Instantly identify rocks