Caribbean Portoro Marble is an exquisite and rare stone quarried in the province of Santa Barbara, Samaná, in the Dominican Republic. It is characterized by a luxurious black base color, interspersed with vivid, bright gold veins that swirl and flow across the surface in dynamic patterns. These gold veins are often contrasted by crisp white streaks, adding to the marble’s striking visual appeal. The overall effect is one of elegance and grandeur, with the combination of the deep black background and the bold gold and white veining creating a sense of drama and sophistication. Caribbean Portoro Marble is highly sought after for high-end applications, including luxury flooring, countertops, wall cladding, and other architectural features, where it imparts a sense of opulence and refinement.

ASTM C97:Absorbtion and Bulk Gravity of Dim. Stone
Average weight percent absorption: 0.53%
Average density: 162.0 lb/ft3
ASTM C99:Modulus of Rupture of Dim. Stone:Load Parallel to Rift
Modulus of rupture in a dry condition:817 psi
Modulus of rupture in a wet condition:1334 psi
ASTM C99:Modulus of Rupture of Dim. Stone:Load Perpendicular to Rift
Modulus of rupture in a dry condition:1062 psi
Modulus of rupture in a wet condition:1016 psi
ASTM C880:Flexural Strength of Dim. Stone:Load Parallel to Rift
Flexural Strength in a dry condition:1004 psi
with a standard deviation of 198.9
Flexural Strength in a wet condition:1190 psi
with a standard deviation of 230.1
ASTM C880:Flexural Strength of Dim. Stone:Load Perpendicular to Rift
Flexural Strength in a dry condition:813 psi
with a standard deviation of 261.0
Flexural Strength in a wet condition:619 psi
with a standard deviation of 335.0
ASTM C170:Compressive Strength of Dim. Stone:Load Parallel to Rift
Compressive Strength in a dry condition:6504 psi
Compressive Strength in a wet condition:7366 psi
ASTM C170:Compressive Strength of Dim. Stone:Load Perpendicular to Rift
Compressive Strength in a dry condition:6451 psi
Compressive Strength in a wet condition:3055 psi
ASTM C1353: Abrasion Resistance of Dim. Stone by the Taber Abrader
Average index of abrasion: 36.8