How do I identify Pairpoint glass?

A rare, substantial, signed, table mirror plate plateau or vanity table mirror, by Pairpoint Glassworks, 1900, America, (MA.) Piece is with markers' mark and date (1900) on underside...

Pairpoint Monumental Hand-Painted Orientalist Oil Lamp, Pyramids, Palms c 1905 Rare oil lamp, USA, c. 1905. obverse-painted glass, patinated metal Measures: 33½ height × 10 diameter in (85 × 25 cm) Provenance: Collection of Edward and Sheila Malakoff Literature: Pairpoint Lamps, Malakoff, pg. 114. This piece is given the" rarity rating" of 1; the rarest of Pairpoint production. Purchase includes a copy of Malakoff text. Pairpoint Glass Company is an American glass manufacturer based in Sagamore, Massachusetts. It is currently the oldest operating glass company in the United States. The company was founded by Deming Jarves in 1837 in South Boston, Massachusetts, as the Mount Washington Glass Works. In 1870, Mount Washington relocated to New Bedford, Massachusetts. In the 1880s, the company primarily produced art glass. In 1885, it introduced Burmese art glass, a translucent, heat reactive glass that shades from yellow at the bottom to pink at the top. The company became known for this type of glass, obtaining a British patent for it in 1886, and presenting a number of Burmese pieces to Queen Victoria. In 1880, British silver designer Thomas Pairpoint (1838-1902) resigned his position as head designer at the Meriden Brittania Company and founded the Pairpoint Manufacturing Company...

Pairpoint Cobalt Blue Wheel-Engraved Floral Art Glass Center Bowl with Controlled Bubble Pedestal, New Bedford, circa 1915–1930 A striking example of early 20th-century American art...

This remarkably exquisite cut glass vase was crafted by one of the oldest glassworks firms in the United States, Pairpoint. The elaborate cut-to-clear decoration is brilliantly cut from a striking bright red to clear in a meticulous geometric pattern. Established in 1880 in New Bedford, Massachusetts, the Pairpoint Manufacturing Company originally produced coffin fittings and metalwork. In 1894, Pairpoint merged with Mt. Washington Glassworks, resulting in an astounding creative output that included fantastic cut glass objet and lamp and lamp accessories, including both cut glass and the well-known Pairpoint blown glass lamps. Today, Pairpoint cut glass...

A fine pair of pairpoint footed vases. In the Ardsley pattern with a "rock crystal" etched design throughout. Designed and manufactured in the 1920s or 30s by Pairpoint. Si...

A pair of elegant tall candlesticks with a diamond cut bodies with silver-plate bases with acanthus leaf decoration, signed on the bottom Pairpoint. 16 inches tall.