This semisolid oil is a sweetly smoky, earthy and mysterious base note. It has a touch of rose to the aroma, and years ago it was used to adulterate Rose Otto.
Emotionally the oil is relaxing and calming, a wonderful de-stresser. The tree is called sacred by the natives of Paraguay, so the oil might also be a good addition to a sacred or meditative blend.
Physically it is said to be anti-inflammatory. Some sources recommend Guaiacwood essential oil as a venous or lymphatic decongestant. I would blend it with Cistus for this use. (Come to think of it, aromatically it would complement Cistus as well. The blend would be delightful!) This same decongesting effect would make Guaiacwood useful for treating the pelvic congestion that can accompany or cause PMS.
Other sources recommend using Guaiacwood in blends to treat gout, rheumatism or arthritis pains, as well as simple fluid retention.
Please note that this is a very thick oil. It can easily be spooned out of the bottle, if you have something small enough to do so. If not, the bottle will need to be warmed to turn the solid oil to liquid. It takes quite a bit of warming to do so.
Safety: Robert Tisserand advises that: no known hazards