Rock On Minerals and Design offers various groups of gemstones that the Spa or Healing Center can add to their menu! Seasonally you could offer a "Gemstone Add On: Red Jasper for Energy, Hematite for Oxygen Transport, Magnesite for Joints, Amber for Mobility, or Blue Chalcedony and Sodalite for lymph drainage and Facials. Gemstones can be used in a Stand Alone Treatment in Blends of Serenity, (balancing yet relaxing in nature) Anti Stress (a normal massage expectation) or even a Blend of "Security" ( a flow with Nephrite Jade).
Designing your own treatment might be a great initiative, or just to get a new vibration moving in the spa, and among your therapists!