Stones can have many aliases. This is due to language differences, supplier choice, coloquial trends or slang, or sometimes errors and ambiguity between rocks. Read more here.
|Alpengrün, Luserna Gneis, Verde San Elena|
Commercial classification sometimes differs to the scientific, geological designation. In particular, some limestones are deemed marble especially if they take a high polish. Read more here.
|Petrographic assignment||Gneiss (Metamorphite)|
|Age||500 million years (Palaeozoic)|
|Colouring minerals:||Feldspar (albite), white quartz, translucent Biotite, silver muscovite scales|
MOHS is the standard scale of hardness for minerals 1-10, with 10 being the MOHS of diamond. We also use the broad terms Hard and Soft for simplicity. Read more here.
Irregular gneissic granite with shining silver flakes.
Slight green hue.
Petrology:Consists of 90% feldspar and quartz which cannot be seen with the naked eye due to the irregular contour of the grain. Black biotite has been partially converted to green chlorite, which gives the rock a light green shade. Silvery muscovite flakes give an unobtrusive glittering effect.
Petrogenesis:Formed during movement of the Alps. Clay and sand sediments underwent metamorphosis at high pressure and temperature.