These earrings feature beautifully shimmering kyanite. The kyanite measures approximately 11x8mm. Above the kyanite, there is a Herkimer diamond (quartz), which is very beautiful. The pins holding the kyanite are brass with rhodium plating. The earrings themselves are made of brass. If you would like to change to hypoallergenic stainless steel earrings, it will be an additional 150 yen. They are on sale.