3D frosted glass four-poi

3D frosted glass four-pointed sparkle icon on black background. The 4-point star shape is rotated 45 degrees so the four tips point to top-left, top-right, bottom-left, bottom-right diagonal directions. The shape is plump thick and puffy with slightly rounded tips. Frosted translucent matte glass material with soft inner glow. Color is rich royal blue smoothly blending into bright cyan blue, seamless soft gradient. The blue tones are vivid and saturated like sapphire. Black rounded square background. Premium Apple iOS icon quality. No text. No green no yellow.