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It occurs most commonly in the minerals columbite , tantalite, and microlite.
Beryl, columbite , and triphylite are common accessory minerals in the Estes pegmatite, especially in the coarse-grained layers.
The abundance of these elements in the parental magma leads to the formation of less-common minerals such as apatite, beryl, topaz, amblygonite, lepidolite, spodumene tantalite, columbite , monazite, zircon, and uraninite.
It is most abundant in the coarse-grained facies and is often associated with triphylite, columbite , and sphalerite.
These minerals are columbite , microlite, futile, thorite, and zircon.
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