According to a police statement the store was targeted by three men dressed in dark clothing who threatened staff with various “bladed weapons” at around 11:30am on June 6.
The trio then smashed a number of display cabinets before making off with a “significant quantity of jewellery”. The suspects were then seen getting into a white BMW car, which was recovered a short time later in Gloucester road, Edinburgh.
The men abandoned the vehicle before getting into a medium-to-large sized dark coloured car that was last seen heading towards Stockbridge.
It is not yet known the full value of the items stolen, however it is estimated that the haul totals more than £1 million.
Detective Inspector Craig Finnie said: “Staff were left extremely shaken and a major investigation is underway to trace those responsible. While we remain keen to speak to witnesses who were in the George Street area at the time of the robbery, we also wish to trace anyone who remembers seeing both getaway vehicles in the Gloucester Lane area before or after the crime was committed.
“Furthermore, anyone with any further information relevant to this enquiry is also asked to contact police immediately.”
Those with information can contact Police Scotland on 101 or alternatively, the charity Crimestoppers on 0800 555 111.