Similar to standard spearmint oil, Spearmint Terpenes are derived from the Mentha Spicata plant and have a distinctly minty-green aroma. The odor of this material is herbaceous and somewhat bitter, though it still retains much of spearmint’s penetratingly powerful top note. Spearmint terpenes are sometimes blended with peppermint to create the ever-popular “doublemint” variety.