Sienite Della Balma Granite
Return to granite samples page.
Synonyms: Balma, Sienite Balma, Sienite Biella, Sienite di Balma, Sienite Val Cervo, Sienito Val Cervo, Siente Balma, Val Cervo
Location: Sienite Della Balma granite is quarried near Val Balma and San Paolo Cervo, Val Cervo, Provincia di Biella, Piemonte, Italy.
Description: Sienite Della Balma granite is a medium to coarse-grained, brown-grey monzonite of the Oligocene period, with brown orthoclase and white plagioclase. This stone internationally may be nominated as a granite but in the area of application of the European Standard this stone must be nominated as a monzonite.
A small sample of Sienite Della Balma granite is usually representative not having a wide variation in colour and veining however swatch samples must be approved for large projects to ensure that the blocks are all extracted from the same quarry face for matching purposes. Ideal for both interior and exterior use, Sienite Della Balma granite is frost free and polish constant.
Mineral Composition: x
Technical and Physical Characteristics:
Bulk density: 2,695 - 2,700 kg/dm≥
Bending strength: 15.70 - 16.10 N/mm≤
Compression breaking load: 237.8 - 244 N/mm≤
Water absorption: 1,1 vol.-%
0.30 - 0.42 weight-%
Abrasion resistance: 0.5 mm
Monzonite: An intermediate igneous intrusive rock composed of approximately equal amounts of sodic to intermediate plagioclase and orthoclase feldspars with minor amounts of hornblende, biotite and other minerals. Quartz a minor constituent or is absent; with greater than 10% quartz the rock is termed a quartz monzonite. If the rock has more orthoclase or potassium feldspar it grades into a syenite. With an increase of calcic plagioclase and mafic minerals the rock type becomes a diorite.