Pyatenkoite-(Y) (RARE!) with Tsepinite-(Ca) and Kentbrooksite (ex Matioli)

Kirovskii apatite mine, Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Thumbnail, 1.1 x 1.1 x 0.7 cm
Start Time: 07/23/2015 6:45:00 pm (CDT)
End Time: 07/30/2015 7:08:37 pm (CDT)
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Item Description

Pyatenkoite-(Y) is an incredibly rare member of the Hilairite group, and is only found in two places in the world (both in Russia). This is undoubtedbly the only piece of the species that we've handled. It's a micro to be sure, but this is super rare material. It comes from the collection of Paolo Matioli, whose label states that it is associated with Tsepinite-(Ca) (a member of the Labuntsovite Supergroup) and Kentbrooksite (a member of the Eudialyte Group).

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