igneous

Granite (with Beryl/Aquamarine)

Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)

Hardness 6-7.5 (Beryl component), phaneritic texture (visible crystals), light green to blue-green beryl crystals set in a matrix of pinkish-tan feldspar, smoky quartz, and black biotite. Vitreous luster.

Identified May 10, 2026More igneous →

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Physical properties

Formation & geological history

Formed from the slow cooling and crystallization of silica-rich magma deep within the Earth's crust, often in pegmatite veins where larger crystals can grow. Commonly associated with Precambrian or Paleozoic tectonic events.

Uses & applications

Primarily collected as a mineral specimen. If the Beryl crystals are high quality, they are used as gemstones (Aquamarine). Granite itself is used in construction and decorative slabs.

Geological facts

The light green mineral visible in this specimen is a member of the beryl family. Beryl is the source of the rare metal beryllium, which is used in high-tech alloys for spacecraft and missiles.

Field identification & locations

Identify in the field by looking for distinct hexagonal prisms of light green beryl embedded in a coarse-grained crystalline matrix of quartz and feldspar. Found in pegmatite-rich areas like New Hampshire, California, or Brazil.

Other igneous specimens

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Blue Apatite

Fluorapatite (Ca5(PO4)3F)

mineral

Dark Igneous Rock (Likely Basalt or Diabase)

Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.

Igneous

Magnetite

Iron(II,III) oxide (Fe3O4)

mineral

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

mineral

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

mineral

Magnetite

Magnetite (Fe3O4)

mineral