Watches & Jewellery
Guernsey’s offers emerald collection in April auction
Guernsey’s will offer emeralds from Manuel Marcial de Gomar’s collection
Rough diamond sales are rising as China's investors seek luxury brands
'Demand will outstrip supply' of rough diamonds over the next decade, an expert has warned
Celebrating a rough diamond: unique gold ring is set to star at Bonhams
The 15th century piece, dating from before diamonds were cut to shape, will lead the fine jewellery sale
