Umukoro w'ibanze: Icyegeranyo cy'Imitako Umwandiko w'Igitabo: 4C ni icyegeranyo cy'imitako kigizwe n'imikanda n'ibihera byakozwe mu ifeza ya sterling yongeye gukoreshwa (recycled sterling silver). Ibice byagaragaza imigongo y'amabara y'amasaphire (diamond outlines) aho kuba amabuye nyakuri, biha uburyo bwiza kandi bubungabunga ibidukikije mu mwanya w'amasaphire nyakuri. Imisusire yakozwe hifashishijwe ubugenzuzi bwa 3D (3D modelling), gucapa insa mu bugarama (wax printing) no kuvomera hakoreshejwe uburyo bwa "lost wax casting", hanyuma bikoranishwa kandi bikarangizwa n'intoki. Harimo uburyo bune bw'ubukorane (cuts): brilliant, princess, marquise, na pear. Kuvunika kw'urumuri (polished), ubwoko bw'ibara ryatsindagiye (matte patina), n'ubwoko bwuzuye zahabu (gilded finishes) byongera itandukaniro kandi bigaragaza neza imisusire y'ubunini butatu (three-dimensional form) ya buri gice.
Izina ry'umushinga : 4 C, Izina ryabashushanya : Hanna Korhonen, Izina ry'abakiriya : Hanna K Design & Jewellery.
Igishushanyo cyiza nuwatsindiye igihembo cyumuringa mububatsi, kubaka no guhatanira imiterere. Ugomba rwose kubona ibihembo bya bronze byegukana ibishushanyo mbonera bya portfolio kugirango umenye ibindi byinshi bishya, bishya, byumwimerere kandi bihanga imyubakire, inyubako nuburyo bwo gukora.
