Porfido Valcamonica

Über Porfido Valcamonica

Porfido Valcamonica (DNSA Stein 1360) is a Permian rhyolite (porphyry) quarried at Bienno and Lovere in Val Camonica (Valcamonica), Brescia province, Lombardia, Italy. Distinct from the better-known Porfido Trentino (from Trentino-Alto Adige, further north). DNSA classifies it as Rhyolit in the Ergussgesteine (extrusive/volcanic) group with a largely isotropic structure. Frost-resistant and acid-resistant within normal range, polish durable outdoors -- making it suitable for exterior paving and facade work. DNSA tech data is approximate (tilde values): density ~2600, comp ~250 MPa, flex ~24 MPa, WA ~2%. SC s689 provides more precise measurements: density 2665, comp 296-323 MPa, flex 29.5 MPa. WA of ~2% is unusually high for a volcanic rock and should be treated with caution; it may reflect "by volume" measurement.