Saint O'Niell Alchemy is an atelier of olfactory architecture based in Mill Valley, constructing luxury candle and restorative beauty oil compositions for hair and body.

Using nature as our foundation, our fragrance architecture is intended to incite deep pleasure while leaning into the daring—with an inherent disdain for the formulaic.

The vision is steered by Isabelle, whose creative trajectory was forged through an early immersion in global brand identity alongside top-tier industry leadership, before applying that sharp visual acumen into celebrated careers in both fashion and interior design. Recognized by Women's Wear Daily as one of the top fashion designers to watch in the United States, Isabelle brings a proven track record of creating, producing and distributing to the nation's premier luxury department stores.

Drawing upon her background in interior architecture and fashion design, Isabelle built her craft on a foundational principle: To construct using only the highest quality materials, balancing proportion, scale and weight in consideration of both the internal harmony of the scent blend and how the scent exists within a space. She does not simply blend oils but rather shapes them to realize a singular vision—uninterested in recreating what has already been done.

n 2020, she channeled this lifetime of design pedigree entirely into her decade-long candlemaking practice. Engineering a proprietary multi-wax blend and consulting with cosmetic scientists to perfect her hair and body oil formulations, she translated her visual language into the sensory world. From this precise intersection of art, science and technical mastery, Saint O'Niell Alchemy was born.