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The Topaz Mutation in Canaries The first  topaz canary was bred in 1976 by the breeder Mr. Asheri from Italy. The topaz mutation is autosomal recessive inherited. The phaeomelanin is complete absence what makes a good contrast between the striations and the ground colour. The special feature of topaz canaries are the modification of the colour of the eumelanin. There is a concentration of the latter along the central shaft of the feather. That makes large clear areas on the edge of the wing and tail feathers to be visible. The quills show no pigment. The striations in the black topaz canaries are similar to the classical black series but of a dark chocolate black colour and well defined. Beak, legs and claws are lightly melanised. The eyes are dark. The striations in the brown topaz canaries are similar to the classical brown series, also in the colour. Beak, legs and claws are flesh coloured. The eyes are dark red. The striations in agate topaz canaries are similar to the classical agate series, cestnut coloured but very dark, approaching black. Beak, legs and claws are clear. The eyes are dark. About the topaz mutation in the isabel series we have no sufficient results because insufficient examples have been bred. NOTE:  By the combination with the optical blue factor or azul factor arises in topaz canaries a better contrast, especially in topaz mosaic canaries. Agate topaz mosaic canaries combined with the optical blue factor or azul factor will increase the marked contrast with a pearl grey edging to the feather and between the striations.