In granite pegmatite as a near-surface alteration product of gadolinite (Rode Ranch pegmatite, Texas, USA); in altered volcanic tuff (Honeycomb Hills, Utah, USA).
IMA Status:
Approved IMA 1970
Locality:
In the USA, from the Rode Ranch pegmatite, Llano Co., and the Clear Creek pegmatite, Brunett Co., Texas, and in the Honeycomb Hills, Juab Co., Utah. Link to MinDat.org Location Data.
Name Origin:
Named for Beryllium, Be, and hydroxyl, OH, in its composition.
Chemical Formula: 