When purchasing rough raw gemstones, it is essential to have a discerning eye to ensure you acquire high-quality specimens with great potential. Start by examining the color and clarity. Look for gemstones with vibrant and rich colors, free from discoloration or dullness. Assess the clarity, aiming for specimens with minimal visible inclusions or fractures that may affect their value. Pay attention to the crystal formation and shape, as well-formed and distinct crystals are desirable. Consider the size and weight, as larger rough gemstones offer more possibilities for cutting and shaping. Additionally, inquire about the source and ensure ethical and responsible mining practices. Lastly, purchase from reputable gemstone dealers who can provide accurate information and offer guidance on the potential value and usage of the rough gemstones. By considering these factors, you can confidently select rough raw gemstones with great potential for your gemstone collection or lapidary projects.