1) newdirectionsaromatics:Frankincense Essential Oil (Egyptian) 1/2 oz: $11.17
2) mountainroseherbs: Frankincense Essential Oil 1/2 oz: $21
https://www.mountainroseherbs.com/products/frankincense-essential-oil/profile
3) rockymountainoils: Frankincense, Sacred 15ml (=1/2 oz): $76.46
http://www.rockymountainoils.com/frankincense-sacred.html
4) youngliving: Frankincense Essential Oil 15ml (=1/2 oz:$96.71
https://www.youngliving.com/en_US/products/frankincense-essential-oil