SAN SEBASTIAN LIMESTONESan Sebastian Limestone is a warm beige limestone with no movement or patterning. Surface treatments can accentuate or muffle the colour while also providing variable degrees of non slip effectiveness or textural appeal. Most common types of staining agents in a limestone are rustic stains of metals, Bronze and copper stains from unattended copper salts, dyes and inks, organic stains from tea, coffee, etc.