Exploração de calcário em zonas cársticas


Guia de boas práticas em discussão pública A Sociedade Brasileira de Espeleologia disponibilizou a versão preliminar do Guia de Boas Práticas de Mineração de Calcário em Áreas Cársticas e convida todos a participar enviando críticas, comentários e sugestões. (a Terra é de todos; neste caso, este Guia está à disposição de todos os falantes da língua … Continue reading Exploração de calcário em zonas cársticas

AZUL – Blue-gray ornamental limestone varieties from Portugal


There are several current varieties of grayish/blue limestone, all from the same general region of Portugal: the Mira de Aire and Candeeiros Range in the West of Portugal (the Azul Cascais limestone reserves nearby Lisbon are virtually depleted or inaccessible due to urban sprawl). Those varieties are: Vidraço Ataíja Azul: Very hard compact limestone, finely … Continue reading AZUL – Blue-gray ornamental limestone varieties from Portugal

A new beautiful fossiliferous limestone from Portugal


NEW TO THE MARKET LIMESTONE While looking for bluish-gray (or grayish-blue) limestone – a request from a potential client, we were shown a new variety of fossiliferous ornamental limestone. It’s a beautiful stone, its mining just starting. Additional photos of in the rough and sawn exposed outcrops and polished sample slabs of this new variety … Continue reading A new beautiful fossiliferous limestone from Portugal

Portuguese limestone: textural and color range


Limestone is a natural stone type extracted, processed and used in buildings and pavements in Portugal for many centuries. Small samples (and photos) hardly capture the full variation range of color and texture of natural stones. Even so, the picture above tries to depict some of the Portuguese limestones beauty. The image was (laboriously) created … Continue reading Portuguese limestone: textural and color range