How to differentiate between pure essential oil and synthetic ones?!

How to differentiate between pure essential oil and synthetic ones?

I know there are many fake essential oils in the market, but i love using them, and want to know of anyway to find out if they are 100% pure or synthetic essential oils, any ways to ''check'' the oils to determine that they are pure?

2 months ago
forgot to add, those i got are in blue and something like brownish bottles, the 30ml one i have costs $26 and the 10 ml one is $18.80

Hi Felicia, natural Essential oil is costly, they need be soldes ideally in either amber or cobalt blue bottles. These are particularly used to keep essential oils because they are dark glass that stops sunlight from penetrating. But Cobalt blue bottles are more expensive than amber colored bottle. Expensive essential oils are available in size as little only as 2ml.
Jason Homan