File:Volga Blue Granite (anorthosite) Zhitomir Province, Ukraine.jpg

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Summary

Volga Blue Granite - a dark, very coarsely-crystalline anorthosite with zoned plagioclase feldspar from Ukraine. This is from the Volodarsk-Volhynsky Intrusion in the southern Korosten Complex, a large igneous suite intruded through the Ukrainian Shield. The Volodarsk-Volynsky Intrusion dates to the late Paleoproterozoic (1.758-1.760 Ga). This material is quarried between the cities of Korosten and Zhitomir, central Zhitomir Province, northwestern Ukraine.

Anorthosites are uncommon intrusive igneous rocks almost exclusively composed of Ca-rich plagioclase feldspar. There’s usually a blackish pyroxene component as well. Anorthosites having labradorite plagioclase feldspar will display a wonderfully colorful iridescent play of colors (labradorescence). This makes them desirable decorative stones.

Licensing

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current04:58, 7 January 2017Thumbnail for version as of 04:58, 7 January 2017964 × 675 (462 KB)127.0.0.1 (talk)<p>Volga Blue Granite - a dark, very coarsely-crystalline anorthosite with zoned plagioclase feldspar from Ukraine. This is from the Volodarsk-Volhynsky Intrusion in the southern Korosten Complex, a large igneous suite intruded through the Ukrainian Shield. The Volodarsk-Volynsky Intrusion dates to the late Paleoproterozoic (1.758-1.760 Ga). This material is quarried between the cities of Korosten and Zhitomir, central Zhitomir Province, northwestern Ukraine. </p> <hr> <p>Anorthosites are uncommon intrusive igneous rocks almost exclusively composed of Ca-rich plagioclase feldspar. There’s usually a blackish pyroxene component as well. Anorthosites having labradorite plagioclase feldspar will display a wonderfully colorful iridescent play of colors (labradorescence). This makes them desirable decorative stones. </p>
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