|Type: Plane Wonder Materials|
|This Instrusive Rocks belongs to acid magmatic rocks, and its main component is silica. It's mostly light red, light gray, gray, etc. It has compact structure, high compressive strength and low water absorption, indicating the extremely high hardness and poor fire resistance. It is often used to build bridges, embankments, harbors, etc. It is also a high-quality material for concrete production.|
|Can be used to build ordinary wonders in the Hall of Overseeing|
|Source(s):|| Alliance Shop for a unit cost of 240
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