Rare

scarce fahr's syndrome connellite blue flash leri's pleonosteosis seld blue thin chalcophyllite sapphirine medium rare berndtite benitoite pashayan syndrome rocking horse shit zajacite rarefy rara avis rhodplumsite foreign accent syndrome haggertyite akhtenskite china syndrome phosphophyllite sirenomelia rareness rarity rarely prune belly syndrome thrombotic thrombocytopenic purpura mooing lesch nyhan syndrome hole in one ultrarare landau kleffner syndrome chkalovite challacolloite williams syndrome marinesco sjögren syndrome heart hand disease seldom locked in syndrome big shot millosevichite selcouth dearth one in million monsterful sporadic uncommon pemphigoid gestationis chorea gravidarum descloizite rarer than hens teeth creutzfeldt jakob disease allan herndon dudley syndrome zuska's disease johannite hyperthymesia triterpene bobble head doll syndrome weilite rear siderophyllite stiff person syndrome exceptional dermatofibrosarcoma protuberans steak pittsburgh rare adermatoglyphia gliomatosis cerebri clover grass robertsonian translocation noselite orphan disease density unique kentucky coffeetree few and far between seldseen niedermayrite semirare crosswordese rare earth hypothesis axenfeld syndrome aurostibite eschynite clydesdale tokyoite quenstedtite bibliopole antrin nonrare medium historically portlandite pseudo pseudo meigs syndrome green flash manganpyrosmalite andersonite common as pig tracks esthesioneuroblastoma royal flush latiumite selly blue rubber bleb nevus syndrome raise howell's spectacular thelypody prime rabbit council common