Sterling silver hooks and wires hold all genuine Swarovski crystals; bicone, cubes & rondelles (in silver plated). The colour of all these crystals is "Tanzanite". Tanzanite is mined in the Mererani Hills of Tanzania. Keeping in the tradition of naming my earring creations after cities I named these Mererani Hills. This colour is one of my personal favourites and this dangling earring is very lovely. Again can be worn all year and can be paired with the Tanzanite Squared bracelet. Super sparkly as with all Swarovski crystals!