This is just a partial list of possible essential oils that can be used.
Chamomile (German and Roman) - Great for dry and sensitive skin, acne, eczema, and dermatitis.
Geranium - Great for oily complexions, acne, mature skin, eczema, dermatitis, and other problematic skin conditions. It also brightens and revitalizes dull skin.
Grapefruit – This essential oil tones the skin and is extremely cleansing for oily skin. If using the amount suggested in the above recipe, there is no phototoxic concern.
Lavender – Very gentle and good for all skin types, including very sensitive skin. Perfect for mature skin, acne, eczema, and psoriasis. Effective in soothing itchy skin.
Palmarosa - Stimulates new cell growth, moisturizes skin, and regulates oil production. This makes it a valuable essential oil for use in any DIY skin products.
Patchouli - Antimicrobial, astringent, fungicidal, and deodorant. Great for acne, cracked and chapped skin, eczema, oily skin, and mature skin.
Peppermint – Since peppermint is very strong, use only half the amount recommended in the recipe (or less). Cooling, refreshing, and stimulating. Has astringent properties, making it perfect for acneic skin. (Note: Avoid during first 4 months of pregnancy.)
Rosemary - Rosemary is stimulating and restorative. Useful for acne, eczema, and dermatitis. (Note: Avoid during pregnancy. Do not use if you are epileptic or have high blood pressure.)
Sandalwood – Useful for acne, dry, cracked, and chapped skin. Also great for wrinkles and mature skin.
Sweet orange - One of the only citrus essential oils that is not phototoxic, sweet orange is helpful for dull or oily skin.
Tea tree - This antibacterial oil can be nicely blended with others like lavender and peppermint. May be useful for acne, oily skin, rashes, and inflamed skin. Using too much may actually create a drying effect. You may need to experiment a little to find the right amount for your skin.