A hazelnut cob is roughly spherical to oval, about 15–25 millimetres (5⁄8–1 inch) long and 10–15 mm (3⁄8–5⁄8 in) in diameter, with an outer fibrous husk surrounding a smooth shell, while a filbert is more elongated, being abou… See more

In 1995, evidence of large-scale Mesolithic nut processing, some 8,000 years old, was found in a midden pit on the island of Colonsay in Scotland. The evidence consists of a large, shallow pit full of the remains of … See more

In 2021, world production of hazelnuts (in shells) was 1.1 million tonnes. The hazelnut production in Turkey accounts for 64% of the world total, followed by Italy, the United States, and Azerbaijan as secondary producers. … See more