SPECIAL AUCTION: RARE SPECIES & CLASSIC OLD MINERALS
from the Kay Robertson Mineral Collection
ends TUESDAY January 8th, 2019

NOTE SPECIAL END DAY: TUESDAY January 8th, 2019
at 630 PM (Central Time Zone)!


The Kay Robertson collection has thus far afforded a great deal of intellectual and mineral pleasure to us here at The Arkenstone, as well as collectors around the globe. Many specimens are of historical and mineralogical interest, so working with them has been a truly gratifying experience.
With 5 updates and several previous auctions already done, we thought it would be a fun change of pace to produce a totally dedicated "Kay auction," and let things go where they may. Please note that a number of these specimens were purchased by Kay 50-60 years ago, at prices that ranged from several dollars to several hundreds of dollars at the time. If these were the prices a half-century ago, just imagine what the possible values are now. There might be some real bargains to be had! Text and photos by collector, Jeff Starr.
For those unfamiliar with the Kay Robertson Collection, Kay is a prominent California collector who specialized in European classics (see our blog at www. https://www.irocks.com/kay-robertson-a-treasure-in-the-mineral-collecting-world ; and the 50+ page article in the German Magazine "Mineralien Welt" November-December 2017). Happy hunting!
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Natrolite
Horseshoe Dam area, Maricopa Co., Arizona, USA
5.8 x 3.2 x 1.5 cm
Autunite (fluorescent)
Les Oudots Quarry, Grury, Saone-et-Loire, Bourgogne-Franche-Comte, Franceo
4.4 x 3.3 x 1.9 cm
Fluorite on Quartz
Yaogangxian Mine, Yizhang Co., Chenzhou Prefecture, Hunan Province, China
7.1 x 4.6 x 3.2 cm
Goethite
Lautenthal, Harz, Lower Saxony, Germany
8.6 x 7.1 x 4.3 cm
Mimetite
Bilbao Mine, La Blanca, Zacatecas, Mexico
4.1 x 3.4 x 2.2 cm
Torbernite (fluorescent) and Unknown (fl)
Margabal Mine, Entraygues-sur-Truyere, Aveyron, Occitanie, France
4.2 x 2.4 x 2.2 cm
Vanadinite on Baryte
Mibladen mining district, Midelt Province, Draa-Tafilalet Region, Morocco
4.0 x 2.6 x 1.3 cm
Fluorite with Calcite
Xianghualing Sn-polymetallic ore field, Linwu Co., Hunan Province, China
4.5 x 3.8 x 3.4 cm
Mimetite var. Campylite
Dry Gill Mine, Caldbeck, Allerdale, Cumbria, England, UK
9.0 x 5.8 x 2.6 cm
Halite
Racalmuto salt mines, Agrigento Province, Sicily, Italy
9.2 x 5.9 x 4.3 cm
Native Silver on Acanthite ps. Argentite
Himmelsfurst Mine, Freiberg, Saxony, Germany
4.3 x 3.5 x 2.7 cm
Mimetite
Bilbao Mine, La Blanca, Zacatecas, Mexico
8.0 x 4.0 x 3.7 cm
Microcline var. Hyalophane
Zagradski Creek, Busovaca, Bosnia and Herzegovina
3.9 x 1.4 x 1.0 cm
Dioptase (Type Locality)
Altyn-Tyube dioptase deposit, Bukhar-Zhyrau District, Kazakhstan (TL)
5.7 x 4.0 x 2.7 cm
Montebrasite
Telirio claim, Linopolis, Minas Gerais, Brazil
4.8 x 4.3 x 1.9 cm
Wulfenite on Mimetite
San Francisco Mine, Cerro Prieto, Sonora, Mexico
4.0 x 4.0 x 4.0 cm
Proustite
Pribram, Central Bohemia Region, Bohemia, Czech Republic
3.0 x 2.6 x 1.3 cm
Staurolite
Keivy Mountains, Murmansk Oblast, Russia
6.9 x 4.7 x 1.4 cm
Molybdenite on and included inside Quartz
Kingsgate, Gough Co., New South Wales, Australia
6.2 x 4.1 x 3.6 cm
Talc
Georgia
6.9 x 4.7 x 2.8 cm
Stephanite - superb old classic from type locality!
Freiberg District, Erzgebirge, Saxony, Germany
3.4 x 2.3 x 2.0 cm
Crocoite with Gorceixite, on Limonite
Red Lead Mine, Dundas mineral field, Tasmania, Australia
5.7 x 4.6 x 2.0 cm
Wiluite (Co-Type Locality) in matrix
Lakutia, Vilyui River Basin, Sakha Republic, Russia (CTL)
6.3 x 4.8 x 3.8 cm
Quartz ps. Orthoclase
Saubachriss, Muldenberg, Klingenthal, Vogtland, Saxony, Germany
6.5 x 4.8 x 1.8 cm
Wulfenite
Los Lamentos Mts, Mun. de Ahumada, Chihuahua, Mexico
8.3 x 7.0 x 4.2 cm
Calcite and Fluorite
Santa Eulalia District, Chihuahua, Mexico
10.7 x 6.3 x 5.5 cm
Kinoite and Fluorapophyllite-(K)
Christmas Mine, Banner District, Dripping Spring Mts, Gila Co., Arizona, USA
4.1 x 2.7 x 1.6 cm
Erythrite and Roselite
Bou Azzer District, Ouarzazate Province, Draa-Tafilalet Region, Morocco
4.5 x 4.5 x 3.2 cm
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