```
Standing at an impressive 50 meters, the colossal black obelisk loomed, its dark material reminiscent of a delicate kind of stone yet exceptionally hard. The front of the obelisk was marked with the Grey Dust Crystal's distinctive emblem — a seven-petaled diamond arranged like wings. The central diamond stood vertically, toweringly prominent, while the six other diamonds spread out on either side like the wings of an angel. Upon closer observation, one could discern the intricate and dense patterns within the diamond shapes, imparting an impression of the sacred, the futuristic, and the advanced.
The color of the Seven-Edged Wing appeared a muted grey, not strongly contrasting against the black obelisk. Perhaps from a different angle, a hint of reflection from the Seven-Edged Wing could catch the eye, suggesting subtlety, mystery, and an ancient air.