When evaluating Mongolian Fur (Tibetan Lamb Fur), the primary quality indicator is the curl definition and hair length, which typically ranges from 4 to 6 inches. High-quality skins should have silky, soft-to-the-touch wool without excessive shedding. Ensure the leather side (pelt) is supple and well-tanned; if the leather is stiff or produces a 'crinkling' sound, it indicates poor processing which leads to cracking over time. Additionally, check for uniformity in color saturation, especially for dyed furs, to ensure no patchy areas exist across the hide.