Recently published
Architecture with natural stone»
Design with natural stone»
- Lithea Company’s new natural stone collection refers to the Byzantine Empire
- Marble, alabaster and onyx are also popular as material for lamps
Markets: Selling Stone»
- Europe has endorsed considering social and ecological issues in public procurement
- Euroroc informs: The United States International Trade Commission (USITC) approves tariffs against Quartz Products from China
Reports from Stone Trade Fairs»
- Italian Stone Theatre at Marmomac 2019: „Naturality: The Uniqueness and Purity of Natural Stone“
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Stone Stories»
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Art: Sculpting with Marble etc»
- Sculptors and other artists may apply for residence scholarships of Künstlerhaus Lukas in Ahrenshoop, Northern Germany
- Art aficionados and citizens of Carrara bring opera to the marble for a change
Briefly noted»
CALANCA GNEISS, a silicate hard rock from the Swiss Alps, from Alfredo Polti company
Name: Calanca Gneiss
Type of stone: Gneiss (with a composition identical to granites)
Quarry: Arvigo, Val Calanca, Grison, Switzerland
Peculiarities: Calanca Gneiss belongs to the silicate hard rocks and is thus suitable for both indoor and outdoor use, even with heavy frosts under complete water saturation and the additional effects of de-icing salt. It has good mechanical properties (abrasion resistance, compressive and flexural strength) and is also resistant to aggressive chemicals.
History: The history of this natural stone began long before the Alps were formed. Originally it must have been sediments from the erosion of older rocks. Today’s stone was formed in a process of metamorphosis deep in the Earth’s crust under high pressure and temperature. It was brought back to the surface in an alpine folding combined with the erosion of the layers above. Geologically the Calanca Gneiss belongs to the crystalline nappes of the Ticino culmination which is a major tectonic structure of the Alps.
Usage: inside and outside
Surfaces: all kinds of finishing
Edges: sawn, broken, rough broken
Contact: Alfredo Polti SA
http://www.alfredopolti.ch
Industria del Granito
Via alla Sega, CH-6543 Arvigo
Technical data:
Download: Italian and German, English
Photos: Alfredo Polti
See also:
(31.07.2018, USA: 07.31.2018)
