Beginner's Guide to Historic Ceramic Identification

When faced with an unidentified sherd, there are three primary attributes which can help lead to identification: paste, surface treatment/glaze and decoration. Paste consists of the clay or a mix of clay and any inclusions (temper) that have been used in forming the body of the ceramic.

It is best to identify paste and surface treatment/glaze first, before tackling decoration. The layered clickable menu below will ask you to choose paste first, and then lead you deeper into surface treatment/glaze and finally into decoration/specific types. Decoration is particularly important in identifying and dating post-colonial refined earthenware. We have also prepared an organization chart of ceramics and their characteristics as a visual aid. Also available is a visual guide of historic ceramics created by Joe Bagley, City Archaeologist of Boston. This poster is ideal for printing and using in the lab or field as a quick visual reference.

Also, please remember that the production of ceramics has been a process with much experimentation with paste and glaze compositions and firing temperatures through time. The characteristics listed below are generalizations that may not hold true for every sherd.

  • variety of paste colors (white, buff, orange, yellow, red, gray, pink)
  • porous paste - broken edge of sherd sticks to tongue
  • paste can appear grainy and, in coarse earthenware, may have inclusions of gravel or be formed from two different colors of clay
  • variety of paste colors (white, buff, yellow, red, gray)
  • hard and compact paste - broken edge does not stick to tongue
  • paste texture smooth to grainy
  • some stoneware will have a dimpled “orange peel” surface
  • white to grayish white paste
  • smooth, vitrified (glassy) look to broken edge; does not stick to tongue
  • thinner sherds may be translucent when held to light

Earthenware - Surface Treatment/Glaze

  • thick glaze (usually white) “floats” on surface of sherd
  • glaze often absent in places or easily flaked from ceramic body
  • generally used on ceramics with low-fired paste that sticks very readily to tongue
  • paste generally buff/pale yellow, but also pink and red
  • shiny, often transparent
  • can be on interior and/or exterior of vessel
  • generally colorless on refined earthenware, but can have metallic oxides added to create colored glazes, most generally on coarse earthenware
  • interior and exterior surfaces of vessel, as well as broken edges, are porous and stick to tongue

Stoneware - Surface Treatment/Glaze

  • dimpled “orange peel” surface on interior and/or exterior
  • decorations can include painting, incising, sprig molding, engine turning
  • fine grained and non-porous; vessel surface often dull or flat in tone
  • decorations can include sprig molding, engine turning, enamel painting

ENGLISH DRY BODIED STONEWARE

  • very thin layer of shiny, smooth glaze; thinness of glaze accentuates molded decorative details
  • decorations can include overall molding, sometimes in deep relief, and sprig molding

RELIEF MOLDED STONEWARE

WHITE FELSPATHIC STONEWARE

NORTH AMERICAN STONEWARE

BRISTOL GLAZE ASH/ALKALINE GLAZED SLIP GLAZES (ALBANY-TYPE)
  • smooth, white opaque glaze
  • often seen on buff bodied stoneware; often used in conjunction with Albany-type slip
  • sometimes used in conjunction with sponged or stamped decoration in blue or other colors
  • thick, runny, lustrous, transparent glassy glaze
  • wide variations in color (olive, black, brown, green, yellowish)
  • runs and streaks typical; often include bits of sand or rock
  • shiny brown (most often chocolate colored) layer over stoneware body; smooth, untextured and opaque (Greer 1981:200)
  • sometimes used on interior of a vessel whose exterior is salt glazed

Porcelain - Surface Treatment/Glaze

SOFT PASTE BONE CHINA
  • highly vitrified white to off-white paste
  • paste impervious to staining
  • under short and mid-range ultraviolet light, the glazed surface of hard paste porcelain appears magenta or dark purple
  • dense and ‘chalky’ paste slightly more porous and softer than hard paste; paste often has a greyish hue, sometimes with surface black specks
  • can become discolored or stained
  • paste scratches easily with a steel file
  • glazed surface fluoresces a dull pink to grayish purple under shortwave and mid-range ultraviolet light
  • paste may appear dense and finely-grained
  • sherd surfaces and cracks more likely than hard paste to exhibit brown staining
  • early pieces, may have small black flecks in the paste
  • under short and mid-range ultraviolet light, glazed surface appears blueish white

Additional Identifying Characteristics of Ceramic Wares

Lead Glazed Refined Earthenware
RED PASTE GRAY/PURPLE PASTE WHITE/CREAM PASTE YELLOW/BUFF PASTE

AGATEWARE

  • variegated paste created by mixing two or more different color clays, typically red and yellow
  • vessel walls generally thin in cross section

ASTBURY

  • thinly potted earthenware with a dense, dull-red body and a ginger colored lead glaze

JACKFIELD-TYPE

  • thin purplish to gray body covered with a lustrous black glaze

CREAMWARE

  • thinly-potted, cream-colored body with a clear lead glaze
  • glaze pools yellow in foot rings
  • glazed surface appears yellow or cream colored when held against white paper

TORTOISESHELL

  • thinly-potted, cream-colored body with sponged decoration in combinations of green, brown, purple and yellow

GREEN GLAZED

  • thinly-potted, cream-colored body with green translucent lead glazed surface

PEARLWARE

(note: see decoration as a way to date these vessels)

  • thinly-potted white body with clear lead glaze
  • glazed surface appears blueish when held against white paper
  • glaze pools blue in foot rings
  • note: some mid-19th century refined white earthenware and white granite sherds will also have a blue cast to the glaze and blue pooling in foot rings
  • variety of decorations used - edged, painted, printed, dipped

WHITEWARE

(note: see decoration as a way to date these vessels)

  • thinly-potted white body with clear lead glaze
  • glazed surface appears white when held against white paper
  • variety of decorations used – painted, dipped, printed, edged, sponged, decal

WHITE GRANITE

(note: see decoration as a way to date these vessels)

  • paste of some wares have a light gray/blue tint; others more white
  • molded motifs usually only form of decoration
  • glazed surface often has blue or grayish hue
  • crazing of glaze common
  • thicker vessel walls compared withsssslier refined earthenware

MANGANESE MOTTLED

  • buff-bodied, covered by a yellowish glaze mottled with dark streaks/speckles

NORTH MIDLANDS-TYPE

  • buff-bodied, coated with white and dark slips, with trailed, combed, or marbled designs; the white slip, which usually forms the background for the dark slip decoration, appears yellow through the clear lead
  • glaze

YELLOW WARE

  • very pale buff to dark golden
  • decorations can include banding in blue, white, brown and pink slips or fernlike
  • mocha motifs
  • usually in hollow forms only

ROCKINGHAM

  • a buff to yellow paste and a brown mottled and streaked glaze, often characterized by patches of the vessel’s body showing through
  • molded decorations common
Lead Glazed Coarse Earthenware
RED PASTE PINKISH PASTE YELLOW PASTE VARIEGATED/MULTICOLOR PASTE

BORDER WARE

  • light reddish paste, sometimes streaked with white/gray clay
  • generally glazed only on the interior surfaces

BLACK GLAZED RED EARTHENWARE

  • red paste
  • black lead glaze

NORTH DEVON<

  • pink or reddish to orange colored paste with a gray core
  • coarse, angular gravel sometimes included in paste
  • thin lead glaze ranging in color from yellow to green to light brown
  • often only glazed on interior of vessel

NORTH DEVON SGRAFFITO

  • reddish pink to orange paste that can have a gray core
  • incised slip decoration of brown motifs on yellow background

BORDER WARE

  • fine-grained paste in a range of colors: pale gray, yellow to pinkish buff or very pale brown
  • glaze colors include yellow, apple green, olive green and brown
  • generally glazed only on the interior surfaces

NORTH DEVON

  • pink or reddish to orange colored paste with a gray core

NORTH DEVON SGRAFFITO

  • hard brick-red to purplish paste that combines red and yellowish clays

BUCKLEY

  • vessel walls usually thick, often with ribbed exteriors
  • generally glazed with a thick black lead glaze

Salt Glaze Stoneware

RHENISH BLUE AND GRAY NORTH AMERICAN RHENISH BROWN ENGLISH BROWN
  • light to dark gray paste
  • vessel interior surface is often a different color than its exterior
  • decorations include blue and purple painting, sprig molding, incising, cordoning
  • often gray paste, but also buff, whitish, black, salmon or reddish brown
  • decorations include blue painting and stamping
  • brown to gray pastes that are coarser in texture than Rhenish blue and gray
  • brown to gray pastes that are coarser in texture than Rhenish blue and gray
  • vessel interior surface is often a different color than its exterior
  • brown slip added to the surface before firing
  • grainy paste that is gray in color
  • dark flecks of hematite characteristic in paste
  • brown slip added to the surface before firing

Salt Glaze Stoneware

HOHR WARE WHITE SALT GLAZE NOTTINGHAM-TYPE
  • off-white or very light gray paste
  • no painting on vessel surface
  • decorations include sprig molding, cordoning and incising
  • homogenous, fine-textured non-porous paste that ranges in color from pale gray to tan to white
  • as typical of refined stoneware, the vessels are generally thin in cross-section
  • decorations include incising, sprig molding, painting, rouletting or printing
  • homogenous paste with no visible inclusions that ranges in color from light to dark gray; buff to deep orange occasionally present
  • as typical of refined stoneware, the vessels are generally thin in cross-section
  • metallic glaze, sometimes underlain by white slip
Hard Paste Porcelain
CHINESE PORCELAIN JAPANESE PORCELAIN EUROPEAN PORCELAIN
  • gray-blueish surface cast on blue painted pieces; more white on overglaze decorated pieces
  • glaze absent on foot rings
  • blue underglaze painting – never printed
  • overglaze painting in reds, greens, black (less often yellows, pinks)
  • white vessel surface color
  • highly translucent
  • decoration includes overglaze printing in blue, red and black; painting to highlight printed designs; use of stenciled designs
  • white vessel surface color
  • highly translucent
  • glaze absent on foot rings
  • printed and painted decorations, as well as multi-color decals