Small Granodiorite 158g Collecting ,decor, educational purposes For Sale

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Small Granodiorite 158g Collecting ,decor, educational purposes:
$15.00

Diorite is a coarse-grained, intrusive igneous rock famously known for its striking \"salt and pepper\" appearance. It is intermediate in composition, meaning it sits right between low-silica gabbro (basaltic) and high-silica granite. It forms deep underground where magma slowly cools and crystallizes, giving the individual mineral grains enough time to grow large and interlock.Key CharacteristicsMineral Composition: Mostly composed of sodium-rich plagioclase feldspar (the white/light grains) mixed with dark amphibole minerals like hornblende and biotite mica. It contains very little to no quartz.Texture: Phaneritic, meaning its mineral crystals are large enough to be easily seen with the naked eye.Color Range: Typically medium to dark gray, but can exhibit black, blue-gray, or greenish hues depending on its specific mineral variants.Geological Equivalent: The fine-grained, volcanic (extrusive) Mineral Rock, 158g