Portoro Gold

Country of origin: Italy

Compression breaking load: 1,862 kg/sq.cm

Ultimate tensile strength: 104 kg/sq.cm

Thermal linear expansion coefficient: 0.005 mm/m°c 

Frictional wear test relative abrasion coefficient: 0.74

Weight per unit of volume: 2,712 kg/cu.m 

This Stone of the Month supplied by Cactus Stone, Phoenix, AZ. Technical details provide a frame of reference only. Because stone is a product of nature, testing to determine specific physical qualities should be repeated for each project. To submit your own Stone of the Month, send a high-resolution digital image, along with the relevant technical data, to michael@stoneworld.com.