I made a pair of these for a friend for her birthday and just decided to offer the design to the public. 
I have wired two types of garnets, blue opals and marquis quartz that radiate purples and blues in your choice of wire and earwires ( if ordering at shirzay.com ) or the Sterling silver French ball style earwire if purchasing through “shops” on Instagram and facebook. 

The approximate length is 1 5/8”. Your jewelry will arrive beautifully giftboxed.