Basalt & andesite

Basalt is an extrusive igneous rock, sometimes porphyritic, and is often both fine-grained and dense. Basalt in the tops of subaerial lava flows and cinders will often be highly vesiculated, imparting a lightweight "frothy" texture to the rock. The term basalt is often casually applied to shallow intrusive rocks with a composition typical of basalt, but rocks of this composition with a phaneritic groundmass should generally be referred to as gabbro. The crustal portions of oceanic tectonic plates are predominantly made of basalt.

Andesite is an extrusive igneous, volcanic rock, of intermediate composition, with aphanitic to porphyritic texture. In a general sense, it is the intermediate type between basalt and dacite, and ranges from 57 to 63% silicon dioxide (SiO2) as illustrated in TAS diagrams. The mineral assemblage is typically dominated by plagioclase plus pyroxene and/or hornblende. Magnetite, zircon, apatite, ilmenite, biotite, and garnet are common accessory minerals. The quartz-feldspar abundances in andesite and other volcanic rocks are illustrated in QAPF diagrams.

As a leading manufacturer in China, China Refine Industry Co.,LTD provides many kinds of andesite and basalt, mainly in colors light grey, dark grey, black, dark black, light black. Available are tiles, slabs, cut-to-sizes, paving stone, sinks, steps, carvings, etc.

Exterior Products
Kerbstone   Round stepping stone   Cube stone   Pavers on mesh   Palisade   Other Exterior paving stone   Red lava rock   Red Porphyry   Green porphyre   Sandstone   Basalt & andesite