There were 12 bicolored red/green scepter tourmaline crystals of highest quality; brazilianite matrix specimens 30 cm wide; superbly crystallized rose quartz clusters with childrenite rosettes; doubly terminated herderite
crystals more than 10 cm long, on matrix; morganite crystals with phantoms; euclase crystals to 6 cm, the smaller ones richly colored.
The identification was based on goniometry, so the mineral is most likely hydroxyl-herderite
, inasmuch as true herderite
(F > OH) is virtually unknown in nature (Mandarino and Back, 2004).
Associated minerals are: albite, potassic feldspar, roscherite, viitaniemiite, childrenite, quartz, apatite, herderite
, elbaite and montmorillonite.
And Dudley had some nice doubly terminated crystals of lime-green herderite
from Chhappu, Baltistan, Pakistan, near the border with China.
During the late 1960's a group of collectors including Josie Scripps and Bryant Harris worked this pegmatite, recovering some very good herderite
and microcline specimens, along with some topaz, schorl, and cassiterite.