"The collaboration evolved from Renee and Ella meeting through a mutual friend in London, proceeding to develop the series over many studio sessions together.
"The two incorporated Renee's natural creative flair for shape and form through her contemporary dance career, which became an overarching theme of their sessions."
As well as being an aspiring model, Stewart is a graduate from the London Contemporary Dance School.
Last year she walked the red carpet at the Brit Awards in London, and also featured on the catwalk at the Milan Fashion Show during the showing of Dolce & Gabanna.
On its website, Monarc says its offerings were "a handpicked selection of international boutiques across Europe and Australasia".
"Monarc is based in London with an emphasis on craftmanship, premium materials and bespoke service. Its objective is to create modern, classic jewellery to be worn now and passed on to future generations.
"Monarc Jewellery is beautifully created by master goldsmiths, it's luxurious and practical enough to be worn every day. For Monarc, jewellery expresses love, relationships, families, and moments that deserve to be marked. Monarc jewellery is designed to stand the test of time."