The center stone looks blue in my house lighting but in the light box it changes to purple. When i shine my flashlight on it the stone goes to teal color. I can't get the camera to show the color changes as everytime i photograph it the stone shows purple. It tests as a sapphire on my presidium gemstone tester so it is a lab grown color change sapphire. The side stones stay purple in every light and this is crafted from solid 9k yellow gold. The setting is 11.2mm point to point so it is not small it's a average size ring and shows well on the hand. This is hallmarked 9k and tested by my jeweler. Weight is 3.2 grams