Places such as Purgatory Chasm and Millstone Hill, in Worcester's Green Hill Park, bear witness to the work of the glaciers.

Geologically, kyawthuite is believed to have crystallized in a pegmatite, a coarse-grained igneous rock that is renowned for hosting anomalous minerals and giant crystals.

igneous rocks, or rocks formed by volcanic activity, such as granite, pumice, and pegmatite, which Furbush said has been found throughout New England, with large crystals within; ...

Pegmatites are coarse-grained igneous rocks containing large crystals at least 1 centimeter in diameter. Composed of feldspar, mica and quartz, pegmatites are formed by the final stages of the ...

Wise specializes in studying pegmatites, a type of igneous rock loaded with quartz and other crystals. Granite-like pegmatites had been mined for decades for the ceramic industry when Wise ...

Pegmatite, an igneous rock similar to granite, commonly holds quartz, feldspar and mica, but some versions also host gemstones like emeralds, tourmaline and beryl.

This mineral is found in significant quantities within an igneous rock known as pegmatite. A team of Ghanaian researchers has discovered a new mineral, tantalum, at Bewadze-Mankoadze in the Kibi ...

When the surface-metal was scoured from the landscape, methods changed eventually giving way to open-cut mining in the host pegmatite vein – an igneous rock with a coarse texture similar to granite.

The mineral is found in large quantities of an igneous rock known as pegmatite. This is contained in a published paper by Mr Emmanuel Daanoba Sunkari, Mr Joshua Nkansah and Salaam Jansbaka Adams on ...

The past three years have witnessed a surge in hard-rock pegmatite lithium mining activity across Southern Africa, according to consultancy firm AmaranthCX. “While Zimbabwe has emerged as the ...