A 10x5mm blue composite turquoise with a 3.00 carat rectangular cushion sky blue topaz in 18K yellow gold over sterling silver ring - the ring where composite turquoise and sky blue topaz create a two-stone blue composition in warm gold. The turquoise provides its characteristic opaque blue with natural variation; the sky blue topaz provides the transparent, brilliant counterpart. Together in warm gold, the two blue stones create a blue material dialogue. Not sizeable.