Gris Pulpis is a Jurassic microcrystalline limestone found in the Maestrazgo Area of the Iberian Mountaing Range (province of Castellón, Spain). This paper reports the results of a detailed study of the mineralogical, petrographic and chromatic characteristics, as well as the durability, of this stone, classified as a commercial marble for its polish ability.

A. General Characteristics. (UNE-EN 12440)

1. Denominacion (UNE-EN12440)

- Comercial denomination: Gris Pulpis
- Petrographic denomination: Microcristalline limestone

2. Physical characteristics.

- Absortion and density (UNE 22-182):
Absorption (%): 0.27+/-0.05
Density (g/cm3)  2.66 +/-0.01

- Compression strength (UNE 22-185): (Mpa):  123.4+/-24.1
- Bend resistance (UNE 22-185): (Mpa): 17.4 +/-