Seperti batuan alam lainnya, batu andesit penuh dengan komposisi mineral. Batu andesit harus dipecahkan untuk melihat warna dan komposisi mineralnya dengan baik. Melansir dari situs Geology.com, batu andesit kaya akan mineral plagioklas feldspar dan amphibole. Selain itu, batu andesit juga memiliki mineral kuarsa dan piroksen dalam jumlah kecil.
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