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Collinsite from Russia
6RG-LFQCollinsite Ca2Mg(PO4)2·2H2O , Bobierrite Mg3(PO4)2·8H2O
Picture width is 80mm. Brown spheres of Collinsite with some colorless crystals of Bobierrite.
UMJ-80RCollinsite Ca2Mg(PO4)2·2H2O , Dolomite CaMg(CO3)2
Dimensions: 4.3 cm x 2.7 cm x 2.7 cm
4.3 x 2.7 x 2.7 cm. A wonderful showy specimen of the rare hydrated calcium magnesium phosphate collinsite from the Kovdor Zheleznyi Mine in Russia. The species was named in 1924 after William Henry Collins a geologist and the former director of the Geological Survey of Canada. This piece hosts botryoidal soft golden colored groups of collinsite sitting on grey rhombic dolomite. Nearly all of the "balls" are undamaged, but a few small contacts can be seen. Overall it's a great example of this incredibly hard-to-find material that came out about 20 years ago (~2000). Ex Kay Robertson Collection. Kay is a prominent California collector, who specialized in European classics (see the article in the March-April, 2007 Mineralogical Record and the 50+ page article in the German Magazine "Mineralien-Welt" November-December 2017).
C4G-DA8Collinsite Ca2Mg(PO4)2·2H2O
Botrioidal mass,
FOV 9 x 7 mm
Collection and photo Roberto Bosi
LWR-TDRCollinsite Ca2Mg(PO4)2·2H2O
Goup crystals Collinsite on matrix Bobierrite
Photo and colletion Germano Fretti
6M8-ETRCollinsite Ca2Mg(PO4)2·2H2O , Kovdorskite Mg2(PO4)(OH)·3H2O
Dimensions: 6 cm x 4 cm x 2 cm
Grey botryoidal mass of the phosphate mineral collinsite. The bluish portions in this piece are the rare Mg-phosphate kovdorskite. 6x4x2 cm
QWX-QG8Collinsite Ca2Mg(PO4)2·2H2O , Dolomite CaMg(CO3)2
Clusters of yellow collinsite crystals (up to 1.5 mm in size) on crystals of colourless dolomite.
FOV is 2.2 cm.
V7X-XVMCollinsite Ca2Mg(PO4)2·2H2O
size5x8cm Paul Bongaerts specimen and photograph
533-DMHCollinsite Ca2Mg(PO4)2·2H2O , Bobierrite Mg3(PO4)2·8H2O
Dimensions: 65 mm x 65 mm x 20 mm
Largest Crystal Size: 0.02 mm
Brownish spherulites of strontian collinsite on pale blue bobierrite crystals. Contains up to 20.9 wt.% SrO (0.74 apfu Sr) and 3.27 wt.% BaO (0.07 apfu Ba) as determined by the wavelength-dispersion X-ray technique (WDS) with a Cameca MS–46 electron microprobe at the Kola Science Centre, Russia.
References: Liferovich, R.P., Pakhomovsky, Y.A., Bogdanova, A.N., Balaganskaya, E.ZG., Laajoki, K.V.O., Gehor, S. and Chukanov, N.V. (2001): Collinsite in hydrothermal assemblages related to carbonatites In the Kovdor complex, northwestern Russia. The Canadian Mineralogist.
Vol. 39, pp. 1081-1094.
Yakubovich, O.V., Kabalov, Yu.K., Gavrilenko, P.G., Liferovich, R.P. and Massa, W. (2003): Strontium in the Collinsite structure: Rietveld refinement. Crystallography Reports. Vol. 4, iss. 2. pp. 226-232.
Keywords" Kovdor, Zheleznyj, collinsite, strontium, strontian, barium, bobierrite.
7TG-TAMCollinsite Ca2Mg(PO4)2·2H2O
Picture width is 40mm. Pale brown Collinsite.
JW4-8EFKovdorskite Mg2(PO4)(OH)·3H2O , Collinsite Ca2Mg(PO4)2·2H2O
Dimensions: 4.1 cm x 2.4 cm x 1.5 cm
4.1 x 2.4 x 1.5 cm. This splayed cluster of cream-colored, lustrous, glassy kovdorskite crystals flanked by sparkling druse of collinsite behind comes from the huge alkali massif on the Kola Peninsula. The longest crystal is 3.75 cm and thus near the record size of the species. From the type locality.