Erika Hartje / Blue Poppy
Precious jewels don't always come in diamond form. These rings by Spain-based Uruguayan jeweller Erika Hartje contain the world's most expensive... spice! That would be saffron which, as I recently discovered, is derived from one of my favourite flowers: the humble crocus.
Above: silver ring with more affordable spices organic ground cloves, cayenne pepper and wasabi powder in resin, by California sisters Erin Lockwood and Jill Redman of Blue Poppy.
Even more jewellery: