aplite - hand/display specimen of aplite from an aplite-pegmatite dike that intruded anorthosite
Back in stock soon. Inquire.
Aplite is essentially a fine-grained granite. With most aplites, the composition is the same as granite, but the crystal grains are a millimeter or smaller in size, so it has a sugary texture. Aplites occur as narrow dikes and veins, and because the injected magma loses heat rapidly, crystals do not have much time to grow.
Aplites are often associated with pegmatites, forming in the late stages in the crystallization of the pegmatite, when volatile elements have migrated higher in the crust. The aplite then solidifies as a granite, but because of rapid heat loss, is finer grained than a granite would be.
This aplite was collected from an aplite-pegmatite dike intruded into the Poe Mountain Anorthosite of the Laramie Anorthosite Complex in Sybille Canyon, Wyoming. The pegmatitic portion of the dike contains garnet and muscovite, indicating that it was derived from crustal material that lay below or adjacent to the anorthosite.
Select a specimen: If there is more than one specimen shown, you can select a particular specimen by telling us what is in the photo with it, a blue or black and silver pen, a black mechanical pencil or one of those plus some number of coins, or you can let us make the selection.
Shipping: By Priority Mail or Parcel Select Ground, whichever is cheaper. Click > here < for shipping rates. See comment at Note! Use back button to return to this page.
Making multiple purchases? Click on the "combine shipping" button in the shopping cart. We'll send an invoice with combined shipping. A link in that invoice will bring you back to checkout, no hassle.