メールでのお問い合わせメールでのお問い合わせ
Porphyry is a term that refers to the texture of a rock, rather than its chemical or mineralogical composition. Indeed, porphyries are generally defined as igneous rocks that feature large, prominent crystals embedded in a finer groundmass matrix.
このページはお住まいの地域ではご覧いただくことはできません。
You are being redirected to our local site.