Gray said since her daughter went missing it had been eight weeks of indescribable pain for her and her family.
"We love you bub and we're not giving up til you're home x Mum."
Police have been approached for comment but said there were no updates at this stage.
Gray previously told the Herald her daughter is many things – outgoing and vibrant with a passion for the outdoors, and has a wicked sense of humour that always "turned a low into a good laugh".
"She is always striving to learn, grow, thrive and do better within and around herself which is what drives her."
The 22-year-old was in the process of completing a nursing course and looking forward to a career in healthcare.
A few weeks ago police revealed they were seeking information about a purple suitcase they believe is "significant" to the investigation.
They said its recovery may help them figure out the circumstances of the 22-year-old's disappearance.
“The clear focus of the investigation is to find Breanna and to establish the circumstances of what led Breanna to be at Te Horo Beach,” Detective Senior Sergeant Dave Thompson said.