A
Abrasive finish : a flat non-reflective surface finish for marble.
Abutment : a solid stone springer at the lowest point of an arch or vault.
Adhered : veneer secured and supported through adhesion to an approved bonding material applied over an approved backing.
Agate : a variegated variety of quartz showing colored bands or other markings (clouded. Moss-like etc)
Anchors : types for stonework include those made of flat stock (strap, cramps, dovetails, dowel, strap and dowel and two-way anchors) and round stock (rod cramp, rod anchor, eyebolt and dowel, flat-hood wall the and dowel and wire toggle bolt.
Arch : a curved stone structure resting on supports at both extremities used to sustain weight, to bridge or roof open space.
Architrave : the member of an entablature resting on the capitals of columns and supporting the frieze.
Argillite : a compact sedimentary rock composed mainly of clay and aluminium silicate minerals.
Arko

G
Gangsawed : description of the granular surface of stone resulting from gangsawing alone.
Gauged or gauging : a grinding process to make all pieces of material to be used together the same thickness.
Glass seam : description of a narrow glass-like streak occurring in stone; a joint plane that has been re-cemented by deposition of translucent calcite in the crack and structurally sound.
Grade course : beginning course at the grade level, generally waterproofed with a damp check or damp course.
Grain : the easiest cleavage direction in a stone. "With the grain" same as "natural bed." Also, particles (crystals, sand grains, etc.) of rock.
Granite : a fine to coarse-grained, igneous rock formed by volcanic action consisting of quartz, feldspar, and mica, with accessory minerals. Granite-type rocks included those of similar texture and origin.
Granite (scientific definition) : a visibly granular, crystalline rock of predominantly interlocking tex

Q
Quarry : The location of an operation where a natural deposit f stone is removed from the ground.
Quartz : A silicon dioxide mineral that occurs in colourless and transparent or coloured hexagonal crystals and also in crystalline masses. One of the most common minerals, the chief constituent of sandstone.
Quartzite : A compact granular rock composed of quartz crystals, usually so firmly cemented as to make the mass homogenous. The stone is generally quarried in stratified layers, the surfaces of which are unusually smooth. Its crushing and tensile strengths are extremely high; the colour range is wide.
Quartzitic sandstone : A sandstone with a high concentration of quartz grains and siliceous cement.
Quirt : A groove separating a bed or other moulding from the adjoining numbers.
Quoins : Stone at the corner of a wall emphasised by size, projection, and rustication or by a different finish.
R
Range : A course of any thickness that is c