Common bleak extracted from the scales of the common bleak, so-called "Essence Orientale" or "pearl essence", (used in making artificial pearls) which is crystalline guanine. Common bleak The common bleak ("Alburnus alburnus") is a small freshwater coarse fish of the cyprinid family. The body of the bleak is elongated and flat. The head is pointed and the relatively small mouth is turned upwards. The anal fin is long and has 18 to 23 fin rays. The lateral line is complete. The bleak has a shiny silvery colour; and the fins are pointed and colourless. The maximum length is approximately 25 cm. In
Bleak House filmed in 1920 and 1922. The latter version featured Sybil Thorndike as Lady Dedlock. In 1928, a short film made in the UK in the Phonofilm sound-on-film process starred Bransby Williams as Grandfather Smallweed. In 1998, BBC Radio 4 broadcast a radio adaptation of five hour-long episodes, starring Michael Kitchen as John Jarndyce. The BBC has produced three television adaptations of "Bleak House". The first serial, "Bleak House", was broadcast in 1959 in eleven half-hour episodes. The second "Bleak House", starring Diana Rigg and Denholm Elliott, aired in 1985 as an eight-part series. In 2005, the third "Bleak House" was