When caffeine crystals are magnified 900x under a microscope, they exhibit a striking, needle-like structure with sharp, elongated edges. The crystals appear as slender, interwoven shards or rods that often form intricate patterns, resembling a crystalline forest or a delicate mesh. Depending on the lighting, the crystals can appear transparent or display a shimmering, reflective quality. The geometric precision of the crystals reflects the orderly arrangement of caffeine molecules within the solid state. These microscopic details highlight the purity and characteristic morphology of caffeine, providing insight into its chemical structure and crystallization properties.