You may submit your stones directly at our laboratory in Central, Hong Kong. Please note the following opening hours:
Mon to Fri
10am to 1pm / 2pm to 5pm
Sat, Sun, Public Holiday
We have extended opening hours during the March, June and September Hong Kong jewellery tradeshows.
Prior to shipping goods to our laboratory, kindly inform us by email or fax about the intended number of stones being submitted for testing. Include an itemized list indicating their weights and wholesale prices. Please include any special instructions, e.g. if the return-shipment address or the shipping information differ from the inbound shipment.
We accept shipments from all major global security transport providers; G4S International Logistics, Ferrari Express Inc., Brinks Global Services, Malca Amit etc. Please use your preferred carrier.
Shipping and laboratory address
GRS Lab (Hong Kong) Limited
19/F, Man Hing Commercial Building
79-83 Queen’s Road Central,
T: +852 2376 3888
F: +852 2568 3888
Please contact us directly about the current turnaround times or if you have any additional questions.
IMPORTANT: It is the clients’ responsibility to insure the goods adequately and to provide the correct customs information.