According to the group the complete refurbishment will allow for “a greater experience with thousands more products on display in what will be the UK’s largest jewellery making store”.
The company has also added a range of new features, including a new workshop area allowing customers to try products before they buy them.
In 1918 Cooksongold established a manufacturing site and sales office on Vittoria Street, to serve both jewellery manufacturers and industrial users in the Midlands area.
MD Martin Bach said: “We are extremely proud to have been a part of the Jewellery Quarter and the wider trade for the last century, and see this anniversary as the perfect time to offer our brand new store to jewellery industry.
“As the UK’s largest jewellery making store, we hope that the service we will provide can continue to help the jewellery industry prosper for many more years to come.”