SPECIAL AUCTION: OLD CLASSIC MINERALS
from the Kay Robertson Mineral Collection
ends Tuesday June 25th, 2019

NOTE SPECIAL END DAY: TUESDAY June 25, 2019
at 6:30 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.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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Hematite - huge for USA, Idaho
Sawtooth Batholith/Sawtooth Mts, Boise Co., Idaho, USA
4.1 x 2.6 x 0.8 cm
Childrenite replaced by Ernstite/Eosphorite
Mendes Pimentel, Minas Gerais, Brazil
5.6 x 4.0 x 2.7 cm
Calcite
Ojuela Mine, Mapimi, Durango, Mexico
4.8 x 2.5 x 1.8 cm
Dioptase on Cerussite ex Lidstrom
Tsumeb Mine, Tsumeb, Namibia
3.3 x 2.4 x 1.8 cm
Calcite (fl) - two generations
Charcas, San Luis Potosi, Mexico
5.0 x 4.8 x 2.9 cm
Callaghanite (Type Locality) on Magnesite
Sierra Magnesite Mine, Gabbs District, Paradise Range, Nye Co., Nevada, USA (TL)
3.7 x 3.6 x 2.5 cm
Calcite on Stilbite, with Nontranite
Kings Valley, Benton Co., Oregon, USA
6.2 x 4.5 x 4.4 cm
Artinite
New Idria District, Diablo Range, San Benito Co., California, USA
5.1 x 3.6 x 1.0 cm
Bournonite on Quartz (old classic!)
Neudorf, Harzgerode mining district, Harz, Saxony-Anhalt, Germany
3.6 x 2.4 x 2.2 cm
Cerussite on Galena
Stibro, Tachov District, Plzen Region, Czech Republic
5.8 x 4.2 x 4.3 cm
Cerussite (V-twin)
Touissit, Jerada Province, L'oriental Region, Morocco
4.4 x 2.8 x 2.4 cm
Calcite inc. by sand
Badlands, Pennington Co., South Dakota, USA
5.7 x 4.7 x 4.3 cm
Tetrahedrite with Chalcopyrite
Mehlbach Mine, Weilmunster, Taunus, Hesse, Germany
6.0 x 4.3 x 3.7 cm
Quartz ps. Laumontite
Mt Gee, Arkaroola Region, Flinders Ranges, South Australia, Australia
2.5 x 1.2 x 0.8 cm
Fluorite (fluorescent) - classic old USA locality
May Stone and Sand Quarry (Fort Wayne), Allen Co., Indiana, USA
4.1 x 2.9 x 2.2 cm
Aragonite and Hematite on Quartz
Egremont, Copeland, Cumbria, England, UK
4.9 x 3.8 x 1.0 cm
Aragonite
Minglanilla, Cuenca, Castile-La Mancha, Spain
4.0 x 3.7 x 3.0 cm
Aragonite and Kutnahorite
Levane, Valdarno, Arezzo Province, Tuscany, Italy
4.8 x 2.9 x 2.8 cm
Stibnite and Calcite
Oaxaco, Mexico
4.3 x 4.1 x 2.6 cm
Calcite
Florida, USA
3.4 x 1.5 x 1.3 cm
Fluorite on Quartz, with Hematite
Johannesschacht Mine, Wolsendorf, Upper Palatinate, Bavaria, Germany
7.8 x 5.3 x 3.7 cm
Artinite
New Idria District, Diablo Range, San Benito Co., California, USA
4.3 x 2.7 x 2.8 cm
Calcite on Azurite (upper oxide zone of classic locale)
Kelly Mine, Magdalena, Socorro Co., New Mexico, USA
6.7 x 4.0 x 2.6 cm
very rich Scheelite (fluor.) on Quartz
Cinovec / Zinnwald, Erzgebirge / Krusne Hory Mts, Germany & Czech Republic
5.5 x 4.4 x 3.5 cm
Calcite on Conichalcite
Ojuela Mine, Mapimi, Durango, Mexico
4.3 x 2.1 x 1.8 cm
Baryte with Pyrite
Zobes, Zobes-Bergen District, Vogtland, Saxony, Germany
5.6 x 2.7 x 2.4 cm
Hydromagnesite
Red Mountain, Black Wonder District, Diablo Range, Santa Clara Co., California, USA
5.3 x 4.2 x 2.1 cm
Calcite
Tsumeb Mine, Tsumeb, Namibia
3.3 x 2.7 x 1.8 cm
Azurite (rare locality)
Schmitt dolomite quarry, Altenmittlau, Freigericht, Hesse, Germany
4.2 x 2.5 x 2.2 cm
Baryte on Skutterudite (Smaltite) ex. Pearse & Harvard Museum
Annaberg District, Erzgebirge, Saxony, Germany
5.7 x 4.0 x 3.3 cm
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