But, Jane Hendler is changing that. As the founder of Ajne Rare & Precious, a custom blending perfumery in Carmel, Calif., she's been concocting couture fragrances for customers such as Reese Witherspoon, Kanye West and Hilary Swank for four years. Now, she brings Ajne Parfum Demi-Blend to the Spa at Four Seasons Las Vegas, making personalized perfumes a spa visit away for locals.

"When I first opened, everyone wanted the custom-blended perfumes but they weren't dedicated to the length of time it took and the $1,500 cost," she says. "Then I came up with the idea of preblended accords."

Every accord contains a blend of the finest and purest essential oils, which Hendler's partner and husband, Rex Rombach, searches high and low to find. Rose oils derive from Bulgaria and champaca oils hail from West India. Each one of Ajne's 200 plant-distilled essential oils is free of aroma-chemicals and phthalates, making them just as friendly to the environment as your sense of smell.

Demi-Blends all start with a test of the chakras, which have become a focus of the spa industry in recent years. Each of the seven chakras represents a different energy center, ranging from communication to spiritual connectedness. Based on questionnaire answers, a mélanger -- a specialist trained in blending custom perfumes -- determines the weakness and strength of each chakra and which accords will aid in harmonizing them. From there, clients sniff out a process of elimination. The final few accords that remain make up the Demi-Blend unique to their needs and senses.

"The pure essential oils in our formulations actually have a balancing effect on each chakra because I divided all my fragrances into chakra categories," says Hendler.

Bottles start at $200 for .5 oz of spray perfume. A black heart flacon dabber is $250 for .5 oz and 1 oz. of spray perfume is $300.

But, perfumes aren't the only form the oils take. Diffusers also can be produced to fill a home, event hall or wedding reception area with a scent. In fact, Four Seasons Las Vegas contemplated holding the Demi-Blends in its bridal salon it's so popular with new brides. Newlyweds can formulate a scent that will forever remind them of their big day and brides can give mini bottles as wedding favors.

"When (a perfume) is one-of-a-kind it becomes even more special," says Hendler.

To schedule a Demi-Blend, contact the Spa at Four Seasons Las Vegas at 632-5302. For more information about Ajne, log onto ajne.com.