Detailed profile of this breed: origin, year of creation, recognised varieties and official approvals.
Identity confirmation
I cannot locate a widely recognized pigeon breed named 'Hyacinth'. It may refer to (a) the color mutation Hyacinth, or (b) a regional breed. Please confirm which you intend and provide a reference (breeding society, standard, or link). If you meant a color variety, I can provide information on that color along with any breed that uses it.