olivine is a medium and low-precious stone with green in yellow, similar to olive. The most common on the discount jewelry market is olivine counterfeit goods made from colored glass.
The main difference between the two is that olivine has a clear "double-shadow," while the glass is not; Crystal qualities inclusions often can be seen within the olivine, while the glass contains only air bubbles; olivine proportion of 3.5, hardness of 7, both are larger than glass proportion (2.6) and hardness (6) .