Growing jewelry

My Mom, the gardener, thinks this is crazy. My sister, the jeweler, thinks it is cool (and wants one). They are the work of Icelandic designer Hafsteinn Juliusson and the silver rings sell for €150. Juliusson calls his creations "a clash of jewelry and gardening, couture and organism...designed for people in metropolitan cities." Others have compared the pieces to Chia pets, and the "green thumb" puns are plentiful. Growing Jewelry is topped with Icelandic moss, and needs to be watered, fed, sunned, and trimmed. If cared for properly, the moss is expected to stay green for 8 to 12 months.

As a side note, I have wondered more than once about the different spellings of "jewelry" and "jewellery." The word in even more variations (iuelrye, jowalre, juelerye) dates to the 14th c. and the OED explains that "jewellery" is more commonly used in a commercial context and is more closely associated with the work of a jeweller, while "jewelry" has a more poetic usage. Dictionary.com, however, simply chalks it up to the differences between American and British spelling.