Is the sapphire bought by the studio made in Sri Lanka?

There are not many sapphire producing areas in the world, mainly Myanmar, Sri Lanka, Thailand, Australia and China. But in terms of gem quality, Myanmar and Sri Lanka are the best. If you want to buy sapphire, you need to know the origin, then you need very good quality sapphire. I suggest you choose bigger brand stores and products with international appraisal certificates. Sapphire certified by an international laboratory will write the place of origin on it. The following are emeralds with guild certificates for your reference.

Have Zulu green certificate

Emerald origin: Columbia