Is a Magnesium Hydroxide with formula: Mg(OH)2.
The hardness is very low, about 2.5 and due to it’s flattened tabular crystal is quite difficult to cut and polish because of the easy cleavage. Rarely transparent, often is translucent ,as this stone here. It is found in many parts of the world and occur in shades of white, bluish, green, yellowish.
This stone comes from Italy.
Size: 9.8x9x4.3 mm.
Weight: 2.05 ct.