Ulexite
Ulexite is a borate mineral recognized among collectors for its crystal form and distribution, with known Chinese sources.
About Ulexite
Ulexite is a borate mineral in the ulexite group and has the chemical formula NaCaB5O6(OH)6·5H2O. It crystallizes in the triclinic system and is relatively soft, requiring careful handling.
Identification & care
Specimens usually show fibrous parallel masses ('cotton ball' borax); rounded nodular; acicular. Its color is typically white and colorless. The luster is silky (fibrous), vitreous, the streak is white, and specimens range from transparent (fiber optic effect) to translucent. The cleavage is perfect {010} and {110}. The fracture is uneven, which aids identification.
Collector context
Collector notes
Among collectors of crystallized species, Ulexite is a recognized reference. Ulexite is widely represented across Chinese provinces, including Inner Mongolia, Tibet, Qinghai.