Designed in Sterling Silver and Cloisonne' Enamel, this necklace perfectly replicates the MourningCloak Butterfly, which is one of a number of species that spend the winter as adults. During cold winter months they pass the time frozen in "cryo-preservation" in tree cavities, beneath loose bark, or unheated buildings to protect them from cold winds and foraging birds or squirrels. The butterfly is suspended on a sterling silver and plum colorede Swarovski crystal necklace that can be worn from 16" to 20" in length. Butterfly is 1.77" (45mm) x 1.38" (35mm). What a beautiful piece of nature to wear on your neck. See the matching earrings.