We appreciate you choosing this app. Our team keeps refining it so everyday use feels smoother, and we welcome a quick message whenever something does not work as expected. This is an offline jade reference and appraisal companion for collectors, dealers, and enthusiasts. Browse 80+ varieties across nephrite, jadeite, chalcedony, serpentine, pyrophyllite, and related gemstone categories, with clear notes on origin, Mohs hardness, translucency, texture, density cues, and typical color range. Open variety profiles for Imperial Jade, Hetian White Jade, celadon jade, and other classic materials, mark favorites, and use guided observation questions on luster, grain, structure, and inclusions to build category confidence during a first-pass appraisal. Capture personal notes with mood, stone details, market thoughts, and a daily takeaway so field reflections stay organized. Review common authentication methods, filter the library by category, and follow a home-screen daily pick when you want a focused study session. Simple preferences for reminders, filters, and haptics keep the workflow tidy on your device without ads, so you can compare jadeite and nephrite qualities, study gemstone traits, check translucency and hardness side by side, and record appraisal insights at your own pace whenever you need a steady reference. Disclaimer: All information in this app is for educational and reference purposes only. Jade authentication results should not be used as the sole basis for purchasing decisions. For valuable pieces, always consult a certified gemologist or reputable testing laboratory.