jeremejevite

jeremejevite

[‚yer·ə′mā·ə‚vīt]
(mineralogy)
AlBO3 A colorless or yellowish mineral composed of aluminum borate that occurs in hexagonal crystals.
References in periodicals archive ?
579) you described the new Myanmar jeremejevite occurrence as being only the fourth known world occurrence.
And here's a real rarity--the KARP dealership also had three loose crystals of jeremejevite from Mogok--an excitingly new occurrence of a very rare species heretofore known only from an old Russian locality and, of course, from two localities in Namibia which produced gemmy blue prismatic crystals.
Minerals have been collected in the Erongo Mountains of Namibia for nearly 90 years, culminating in the 1999 discovery of some of the finest Namibian aquamarine, schorl and jeremejevite ever seen.
As mineral species go, even gem-potential species, diamond is not really rare--how many tons of jeremejevite or sinhalite do you suppose have been found?--but its enduring appeal, not to speak of its many industrial uses, makes the securing of further supplies a pressing concern.
A rare species also showed up this year, jeremejevite in very slender pale blue crystals found in Namibia.
Jeremejevite, * [A1.sub.6][B.sub.5][O.sub.15][(F,OH).sub.3], was originally described by Damour (1883), the type specimens consisting of a few colorless, prismatic crystals to several centimeters from a pegmatite situated on Mt.
Species range from the very common (apophyllite, barite, calcite, corundum) to the semi-exotic (baddeleyite, hauynite, nosean, ettringite, jeremejevite) to the extremely rare (hannebachite, willhendersonite, the not-yet-published batiferrite), and all in selections liberal enough to show a full range of habits--I counted 25 pictures, each one different, of barytolamprophyllite alone.
A few new aquamarines were still available from this locality, as well as some fine, single, blue jeremejevite crystals up to 4 cm.
aquamarine and goshenite), schorl exhibiting various morphologies, apatite, jeremejevite, topaz, and siderite.
Georg Gebhard (D-5 1545 Waldbrol-Grossenseifen, Germany) about the currently very hot localities for aquamarine, tourmaline-group species, and jeremejevite in the Erongo Mountains, Namibia.
Surface collecting and exploration work has reveled blue and champagne topaz to 8 cm, blue beryl, multicolored tourmaline, goshenite, gem purple etched scapolite to 4 cm, rare colorless jeremejevite crystals to 2 cm, and white and sometimes partly purple hambergite crystals.
Mathias Rheinlander of Mikon has some friends living in Namibia who have been collecting at the classic jeremejevite locality of Cape Cross, Mile 72, Namibia.