The Apuan Alps are studied by several authors since the nineteenth century for the presence of important geoheritage mainly represented by metamorphic polydeformed rocks, polymetallic mineralizations and large outcrops of precious natural stones. The Apuan Alps marble is a typology of ornamental stone that is worldwide known for decoration and building purposes as well as for the excellent physical-mechanical properties. This paper aims at improving the knowledge of geology, petrography and microstructures of the marble commercial variety of the Apuan Alps. In particular, this study investigated the Frigido Valley (NW Tuscany, Italy) and its nine stone-work basins: Brugiana, Capraia, Madielle, Rocchetta, Gioia, Valsora, Piastramarina, Piastreta and Forno. Seven marble commercial varieties were identified (namely white, ordinary, veined, grey, “Arabesque-like”, Calacatta and Seravezza Breccias) from these basins, corresponding to more than fifty local names according to the current nomenclature used by the workers during the exploitation work and trading.

中文翻译：

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弗里基多谷地（意大利阿普安阿尔卑斯山）的大理石商业化品种露头的地质特征

自19世纪以来，几位作者就对阿普安阿尔卑斯山进行了研究，研究了重要的地质遗迹的存在，主要表现为变质的多变形岩石，多金属矿化作用和大量的天然宝石露头。Apuan阿尔卑斯山大理石是观赏石的一种类型，以装饰和建筑用途以及出色的物理机械性能而闻名于世。本文旨在提高对Apuan阿尔卑斯山大理石商业品种的地质学，岩石学和微观结构的了解。特别是，这项研究调查了Frigido山谷（意大利西北托斯卡纳）及其9个石制盆地：Brugiana，Capraia，Madielle，Rocchetta，Gioia，Valsora，Piastramarina，Piastreta和Forno。确定了七个大理石商品品种（即白色，普通，纹理，灰色，