A clear guide to what an NGTC certificate means, why it matters in jadeite buying, how to read the conclusion correctly, and how to verify authenticity through official NGTC channels.
Hetian Nephrite—widely known in trade as “Hetian Jade”—is a classic nephrite (soft jade) material associated with the broader Hotan/Hetian region
Aventurine—often sold in China as “Dongling Jade” (东陵玉)—is a quartz-family gemstone. Despite the trade name, it is not jadeite (hard
Jin Si Yu is a trade name for a quartz-family gemstone best described as chalcedony/agate (cryptocrystalline quartz, SiO₂). It is
Tianshan Cui is a popular green gemstone material in recent years. Despite the “jade” nickname in commerce, it is not
Hetian Biyu refers to green nephrite from the broader Hetian/Hotan region of Xinjiang, China. Valued for its fine, compact texture
Jadeite jade is one of the most revered gemstones in the world, renowned for its vibrant colors, rare beauty, and
