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Feldspar with Tourmaline look-alikes

Feldspar (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8) with Tourmaline (Na(Mg,Fe,Li,Mn,Al)3Al6(BO3)3Si6O18(OH)4)

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Several rocks and minerals can be confused with Feldspar with Tourmaline. Below are documented look-alikes and the features that tell them apart. Never rely on a single feature. Always check multiple properties.

Similar rocks to compare

Granite

Quartz, Feldspar, Mica

Also known as: Granitic rock

Pegmatite

Various minerals, often including Feldspar, Quartz, Mica, and accessory minerals like Tourmaline

Also known as: Giant-grained igneous rock

Gneiss

Feldspar, Quartz, Mica, Amphibole, Garnet

Also known as: Banded metamorphic rock

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