READ MORE: Antiques Roadshow guest gasps after finding out pistol given as a gift is worth £20kTalking to expert Hilary Kay, the guest spoke about his grandmother's relationship with silk and sericulture.Tom said: "This is fantastic Hillary!"Granny really was in the world of sericulture, in the world of silk."And this is the original silk moth here Bombyx mori."He added: "These and the eggs around it were responsible for the Queen's wedding dress!"The Queen's spectacular wedding gown was made from ivory silk satin, and was encrusted with 10,000 seed pearls. It was also embroidered with star lilies and orange blossoms.