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DAB
To dress the face of a stone by picking with a pointed tool

DACITE
Fine-grained extrusive (volcanic) rock, intermediate in color and composition between basalt and rhyolite

DADO
Stone treatment on interior walls which does not extend to the ceiling often ornamented

DAMP COURSE
A course or layer of impervious material which prevents vertical penetration of water by capillary action

DAMP PROOFING
Prevention of moisture penetration due to capillary action by the addition of one or more coatings of a compound that is impervious to water

DAMP PROOFING COURSE
A horizontal or vertical course or layer, usually at least six inches above the ground level, that prevents the capillary entrance of moisture from the ground or a lower course

DEFLECTION
The amount by which a horizontal member bends at the center under stress

DELAMINATION
A failure in a laminating assembly characterized by the separation or loss of adhesion between plies, such as in built-up roofing or glue-laminated timber

DEPTH OF GLOSS
The optical phenomenon of relative depth perceived when viewing reflective surfaces

DESIGN
To bring into being a mental concept

DIABASE
A granular igneous rock, dark gray to black, sometimes called dolerite

DIE
A covering layer of interior stone from wall to ceiling

DIMENSIONAL STONE
Stone that has been cut into geometric forms for ornamental or structural purposes. Natural building stone that has been selected, trimmed, or cut to specified shapes and sizes. Final surface treatment or finish is as specified

DIORITE
Granular, crystallized igneous stone composed of feldspar and hornblende

DOLOMITE
Calcium Magnesium Carbonate [CaMg(CO3)2] A calcium magnesium carbonate; a crystalline variety of limestone, containing in excess of 40 percent of magnesium carbonate as the dolomite molecule. Main mineral composing dolomitic limestones and marbles. Dolomite rocks are also referred to as dolostone

DOLOMITE MARBLE
A crystalline variety of limestone, containing in excess of 49% of magnesium carbonate as the dolomite molecule

DOLOMITIC LIMESTONE
A limestone rich in magnesium carbonate, frequently somewhat crystalline in character. It is found in ledge formations in a wide variety of color tones and textures. Generally speaking, its crushing andmestone

DOLOSTONE
A dolomitic limestone

DOVETAIL ANCHOR
splayed tenon that is shaped like a dove’s tail, broader at its end than at its base, which fits into the recess of a corresponding mortise

DOVETAIL MOLDING
A molding in which interlocked triangles are used

DRESSED/HAND DRESSED
The cutting of rough chunks of stone by hand to create a square or rectangular shape. A stone which is sold as dressed stone generally refers to stone ready for installation

DRESSING
The shaping and squaring, sometimes called scabbling, of blocks for storage and shipment

DRIP
A recess cut into the underside of projecting stone to divert water and prevent it from running down the face of a wall or other surface of which it is a part

DRIP MOLD
A molding shaped for drip

DROVE
A mason’s blunt chisel for facing stone

DRY PACK
A type of mud bed with a lesser concentration of Portland cement, which is popular for certain stone floor installations (eg in the case of “grind-in-place” installations of marble and granite floors.)

DRY SEAM
Unhealed fracture which may be a plane of weakness

DUAL FINISH
Dry wall is a stone that is constructed one stone upon the other without the use of any mortar. Generally used for retaining walls

DURABILITY
The measure of the ability of dimension stone to endure and to maintain its essential and distinctive characteristics of strength, resistance to decay and moisture, and appearance

DUTCHMAN
A small, matching piece of dimension stone that is cut, finished and attached with the tightest possible joint to a floor, wall, top, or other larger piece of stone to increase its length or width or to repair or replace a missing or damaged area. Dutchmen are usually affixed in the fabrication shop with epoxy or polyester resin