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Gisselle Catherine Mancebo Castillo (born November 16, 1971, in Santo Domingo, D. R) most known as Gisselle Mancebo is a Dominican industrial engineer and designer of fine handmade jewelry, who founded her own jewelry design studio in 2007.

Early Life
Gisselle Catherine Mancebo Castillo, daughter of the businessman Mr. José Ramon Valoy Mancebo Giuliani and Mrs. Yvonne Altagracia Caridad Castillo Ramírez. She is the oldest of 4 sisters and grew up with a middle-class family from Santa Cruz de Barahona, Dominican Republic.

In the childhood, her grandmother Gisela Ramírez, taught her the good taste for jewelry, using precious pieces with exquisite designs of the time.

At the age of 19 she had her first daughter, Gisela Maria, as a single mother and at the age of 22 she married the engineer César Grullón, with whom she had two children’s, Gimarie and César Valoy. At the age of 46 she divorced.

Career and Brand
Gisselle began her career as a jewelry designer in 2002, making creations for personal use, under the strict quality standards her eyes were accustomed.

Over the time, everyone was fascinated by her designs and pieces, so in 2007 she formally decided to start selling all her handmade jewelry designs. His first public exhibition was in 2018 called "Retomando mis Raices   " at  Quinta Dominica cultural center, Zona Colonial, D.R., which was a collection of 10 years of work in honor of his homeland Barahona, where each piece was named as an emblematic location of the province.

In 2019, she had an exhibition called "Cielo, Tierra y Mar, Delirio Caribeño" ]at the United Nations headquarters in New York City, USA, celebrating the 175th anniversary of Dominican Independence , presenting high Larimar, Amber and Pearls Jewelry.

In 2021, she presented the exhibition called "Ciclos"    at Quinta Dominica cultural center, Colonial Zone, D.R.  exhibiting jewels as true works of art in green, blue and white circles, which the public can appreciate in the photographs and mannequins, representing the evolution of the designer through time.

In 2022, Gisselle received the award for the best designer of Jewelry and Accessories from the Dominican Fashion Awards.

In 2023, Mancebo was part of the high jewelry exhibition "Symbiosis" organized by Caribbean Export agency, funded by the European Union. In this presentation there was a cultural union between two nations, Haiti and the Dominican Republic, to promote innovation and t design of high jewelry of Caribbean art.

Gisselle Mancebo has made different collection launches at international fairs representing her country such as: Abav Expo 2019 Sao Paulo Brazil, Ferien Messe Wien 2020 Vienna Austria, Fitur 2023 Madrid Spain.

Among all this journey, a key person in his development was Gimarie, the second of his three children's, as she has been his most faithful collaborator and model in several of his collections. Another of his great supporters has been his son César Valoy, who has been in charge of the marketing and sales strategies.