9ct Yellow Gold 3.37ct Hexagon Blue Topaz Rub Set Stud EarringsModern and geometric, these stud earrings feature two hexagonal blue topaz gemstones measuring 7mm in diameter. The contrast of the cool blue hues within blue topaz paired with the warmth of the 9ct yellow gold rub over setting make these earrings great for someone who has a warm or cool undertone to their complexion in addition to those who like to mix the tones in their jewellery. As these earrings are part of a set and come with a matching