Genuine amethysts measuring 4mm are housed within 4 prongs below three arches of 14kt yellow gold in these earrings. Earrings measure 11mm long by 10mm wide. Yellow gold and purple represent royalty, and these embody the richness their colors are assigned. Post is located behind the top knob. Amethyst is known as the month of February birthstone, a gemstone associated with qualities of peace, courage and stability. And frankly, we all could use a bit more of this during what can be a cold unfriendly feeling time of year.