Loose Pale Blue Seaham Sea Glass/Loose Beach Glass/Loose Sea Glass/Seaham Sea Glass/Sea Glass Gem Stones Ref 139 Clear Durham Sea Glass . Emerald Cut. 10mm x 12mm, Weight 5.3 carat. Clear and sparkling and Icy Blue. Cut from a sea washed glass pebble found on the beach at Seaham on the North East coast of England. This stone is of exceptional size and clarity, a truly one-off gem. The images show some of the process in the preparation of this stone.