Starwood has opened the 400-bedroom St. Regis Macau, with a 784sq m (8,439sq ft) Iridium Spa on the 38th floor.

Part of a four-tower complex, the St. Regis Macau marks the brand’s seventh location in Greater China and its largest to date. It is owned by Venetian Orient Limited, an affiliate of Sands China, and features interiors by Macau-based Wilson and Associates.

“There is an ever-increasing demand for luxury around the globe, and Macau is no exception, especially with the recent proliferation of luxury brands in the market and a record number of visitors to the destination in 2015,” said Jim Petrus, global brand leader, St. Regis Hotels & Resorts.

The Iridium Spa features 10 treatment rooms, including two couples’ suites, and offers treatments deeply rooted in the Asian culture of gemstone therapy. Treatments are focused on six gemstones with different energy forces: aquamarine for balancing, citrine for renewing, ruby for empowering, sapphire for vitality, tourmaline for healing, and pearl for purifying.

A signature Iridium Personalised Gemstone treatment is a massage that begins with a detailed consultation where clients discover which gemstone is best suited to them; massage oil is then customised based on the gemstone, and the gemstone is incorporated in the massage.

The spa uses customised branded products rich in gemstone minerals, as well as skincare products from Gemology, hand and foot products from Margaret Dabbs and OPI, and salon services from Evo and Wella.

The St. Regis recently opened a hotel in Dubai with a Barr + Wray-designed Iridium Spa, and has plans to open five hotels in 2016, including locations in Kuala Lumpur, Malaysia; Langkawi, Malaysia; the Maldives; Changsha, China and Cairo, Egypt.