Hope the whale tagua nut brooch
Tagua nut is an environmentally sustainable alternative to plastic and it's this that sister jewellery makers Olga and Elisa in Ecuador use to craft this exclusive Hope the whale brooch.
Each one is carved from a single nut - a seed from a type of palm that grows in South American rainforests and also known as vegetable ivory. It's then coloured blue with azo-free textile dyes, packaged in a biodegradable bag and tagged with paper certified by the Forest Stewardship Council.
Olga and Elisa work with London-based Just Trade to sell ethically made accessories and is endorsed by BAFTS, which promotes fair trade in UK retail.
Hope is the name of the blue whale skeleton that suspends majestically from the rafters in the Museum's Hintze Hall, welcoming visitors and acting as a symbol of hope for a sustainable future.
Threatened with near extinction in the twentieth century, blue whales were the first species that humans decided to save on a global scale - and thanks to international conservation efforts, their numbers are increasing.