Gemstones, as we all know are a result of upheavals in the earth's crust where complex chemical and physical processes transform ordinary sand and chemicals into captivating gemstones.

Mining is the first step in the long chain of activities that brings gemstones to the ultimate customer.

STS group understands the importance of this activity and has very strong hold in this sector. Most of its purchases are made directly from mines, in important places such as Tanzania, which has interests in mining too.

A strong hold over mining and procurement, directly from the mines makes sure that STS is always able to fulfill its commitments in this industry where the raw material is always limited and never produced at the factories.