hambergite

hambergite

[′ham·bər‚gīt]
(mineralogy)
Be2BO3OH A grayish-white or colorless mineral composed of beryllium borate and occurring as prismatic crystals; hardness is 7.5 on Mohs scale, and specific gravity is 2.35.
References in periodicals archive ?
Other rarities occurring in the pegmatites of this area include microlite, hambergite and rhodizite (Antandrokomby is one of the world's richest sources of this mineral).
During the 2000s this mine (sometimes incorrectly referred to as the "Khat Che" or "Khat Chay" mine) has given the world superb and distinctive crystals of phenakite, petalite and hambergite; white to colorless though they are, these species from the Paleini mine can be quite beautiful.
There are also, of course, much fancier items in the collection, including sharp floater crystals and twins of some truly rare species: senarmontite, glaucodot, stolzite, hambergite, neptunite, epididymite, a petite cumengite "mace" on boleite, and (naturally) a superb specimen of a member of the whiteite group, specifically of whiteite-(CaFeMg).
And now let's visit Muzaffar Ali of Al-Rehman Gems & Minerals (www.alrehmangems.com), whose room at the InnSuites also harbored some superb hydroxylherderites from Pakistan, as well as some noteworthy hambergite and beryllonite specimens.
At both the InnSuites and the Main Show, Francois Lietard had a handful of very nice thumbnail-size hambergite specimens, found just this past January somewhere near Shengus, Skardu district, Northern Areas, Pakistan.
Aside from yielding literally tons of colored tourmaline, the Himalaya mine has been the source of numerous specimens of other minerals, including fluorapatite, hambergite, stibiotantalite, stilbite, quartz, lepidolite and feldspars.
It is a pure white hambergite embedded in a doubly-terminated beryl crystal; the beryl measures about 4 X 8 cm and is a beautiful pale blue on the top.
In the same showcase was a somewhat gemmy, 2 x 9-cm terminated hambergite, interesting because this crystal is from Nepal.
He also had a variety of 2.5-cm hambergite singles from Anjanabonoina.
A number of good specimens of bicolored elbaite and schorl were recovered, along with a number of other rare and interesting minerals including clinobisvanite, stibiotantalite, danburite, hambergite, pyrochlore, and synchysite (DeVito and Ordway, 1984).
The beryl on lepidolite pictured on page 93 and the hambergite pictured on page 96 were collected by the former geologist of the Mokrusha mine, Igor Gurkov.
Associated minerals include microcline, quartz, albite, tourmaline (elbaite-liddicoatite-schorl series), Cs-rich beryl, spodumene, danburite, Mn-rich fluorapatite, hambergite, microlite, manganocolumbite, manganotantalite, behierite, and hafnian zircon, among others.