Londonite
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Physical & Optical Properties
Mohs Hardness
Crystal System
Value & Market
Where to Buy Londonite
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About Londonite
Londonite is an extremely rare cesium beryllium aluminum borate mineral, closely related to rhodizite, forming small colorless to pale yellow cubic crystals with a vitreous to adamantine luster. It was first described from a pegmatite in Manjaka, Madagascar, and named in honor of gemologist David London. As one of the world's rarest minerals with very limited occurrence, faceted londonite is a significant rarity among boron mineral and collector gem enthusiasts.
Jewelry Use
Suitable for daily wear