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vein cutcutting quarried marble or stone perpendicular to the natural bedding plane.
veiningscolored markings in limestone, marble, alabaster, etc.
vellum glazea semi-mat glaze having a satin-like appearance. 
veneer stoneany stone used as a decorative facing material which is not meant to be load-bearing.
ventingcreating an outlet in a wall for air and moisture to pass through. (see cavity vent.)
verd antiquea marble composed chiefly of massive serpentine and capable of being polished. it is commonly crossed by veinlets of other minerals, chiefly carbonates of calcium and magnesium.
vertical broken jointstyle of laying tile with each vertical row of tile offset for half its length.
vitreous-0.5 percent to 3 percent water absorption.
vitreousthat degree of vitrification evidenced by low water absorption. (see also impervious; nonvitreous; semivitreous.)  note: the term vitreous generally signifies less than t).5 per rent absorption, except for flour and wall tilt and lucvvoltage electrical porechtin which are considered vitreous tip to 3.0 t)er cent water adtsorption.
vitreous slipa slip coating matured on a ceramic body, producing a vitrified surface. 
vitreous tiletile with water absorption of more than 0.5 percent, but not more than 3.0 percent. (ansi a137.1-1980).
vitrificationthe progressive reduction in porosity of a ceramic composition as a result of heat treatment, or the process involved. 
vitrification rangethe maturing range of a vitreous body, producing a vitrified surface. 
voidan unfilled space in a material of trapped air or other gas.
vuga cavity in rock, sometimes lined or filled with either amorphous or crystalline material, common in calcereous rocks such as marble or limestone.