Determining whether a substance is crystalline or amorphous can be challenging, especially since both forms can appear similar in texture. Key differences lie in their structural properties. Crystalline substances have a well-defined, ordered arrangement of atoms, which can often be observed through techniques like X-ray diffraction or polarized light microscopy. In contrast, amorphous substances lack this long-range order. Visual inspection may reveal differences in appearance, such as clarity and shine, with crystalline materials often exhibiting a more defined shape. Additionally, methods such as examining melting points can help distinguish between the two; crystalline substances typically have sharp melting points, while amorphous materials melt over a range of temperatures. Understanding these characteristics can aid in identifying the nature of the substance in question.