N E W E N G L A N D N A T U R A L S T O N E

BLUESTONE ASTM SPECIFICATIONS AND PHYSICAL PROPERTIES

Bluestone is a fine to medium grained arkosic sandstone (geologically referred to as a feldspathic sandstone classified as a sedimentary stone) comprised of mainly quartz, feldspars, micas and accessory iron, titanium, magnesium and calcium minerals. Most market grade bluestones are

indurated with silica cements with lesser percentages of calcium carbonate or clay mineral cementation of sand grain particles.

ASTM C-170-90 Compressive strength across strata

18,255 psi Weight per cubic foot

162.5

ASTM C-170-90 Compressive strength with strata

12,388 psi Abrasion Thermal Face

228.2

Flexural strength across strata 2,977 psi Abrasion Natural Cleft

11.2 Flexural strength with strata 2,180 psi Hardness

6 Moh's scale

ASTM C-97-96 Water Absorption 1.21% Porosity

0.4-6.6 Specific Gravity 2.604

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