Create a colossal Minecraft structu...

Create a colossal Minecraft structure shaped like a giant glowing celestial hourglass. The build should appear as if it is made from molten cosmic energy contained within ancient black stone. It should be perfectly symmetrical around a vertical axis and look like an unstable supernatural artifact suspended between the underground and the sky. The structure should be approximately 300 blocks tall and 200 blocks wide at its largest points. The overall silhouette consists of two enormous circular rings, one above and one below, connected by a narrow glowing waist. The rings are thick, ancient, partially broken, and appear to float around the central energy column. The upper and lower halves mirror each other almost perfectly, forming a giant hourglass shape. The lower half extends deep underg