Cinereplicas Harry Potter - Nagini

At least 15% of the sale price of this jewel will be donated to the Lumos Foundation, a non-profit organisation founded by J.K. Rowling to help disadvantaged children in care. For more information: www.wearelumos.org

"A Charms bracelet may look like a small, worthless item. However, what other piece of jewellery is so imbued with memories and emotions? Why call these little masterpieces "Charms" if not to allude to their talismanic properties? They have a meaning beyond the simple jewel. They are truly personal amulets."

"Lumos is a spell I created in HARRY POTTER™ to bring light into a desperately dark and terrifying place. At Lumos, that's exactly what we're doing: we're putting the spotlight on the children left behind, forgotten and hidden away, so that everyone understands their plight and works hand in hand to get them out."

• J.K. Rowling, Founder and President of Lumos.