A2037) Azurite - 100' level, Emma Mine, Hanover-Fierro District, Grant Co., New Mexico, USA Size: 3.2 x 1.9 x 1.6 cm (thumbnail) Price: $ 425
A very neat and choice grouping of lustrous dark blue diamond shaped azurite crystals, all stacked neatly without matrix. Shows well all around 360 degrees and without damage. This is very fine for the species from New Mexico! Ex Ralph Clark collection. Ralph's label notes that the specimen was collected in June, 1989. B2041) Brookite - Kharan, Balochistan, Pakistan Size: 2.5 x 2.3 x 1.4 cm (thumbnail) Price: $ 650
Two superb gemmy red, with black color zoning, thin platy terminated crystals of brookite to 1.3 cm in length are set aesthetically upon a crystallized dolomite and quartz matrix. The crystals are free-standing and show well all around 360 degrees. No damage - this is an outstanding and aesthetic example for the species! Ex Ralph Clark collection. C2060) Congolite - Trembathite - Boulby Mine, Loftus, North Yorkshire, England, UK Size: 1.3 x 0.7 x 0.6 cm (thumbnail) Price: $ 1100
Congolite and trembathite are extremely rare members of the boracite group. Congolite is a dimorph of ericaite; trembathite is a dimorph of boracite. This specimen came to me labeled as ericaite; according to Neil Hubbard these have since been found to be congolite. The reference cited below states that the specimens are trembathite or a mixture of congolite and trembathite. Regardless, the example shown here is outstanding for both species! A black lustrous single loose crystal, complete all around, and very clean of damage. Ex Ralph Clark collection. Before Ralph, the specimen was in the collection of Lindsay Greenbank. Very fine and choice! Ref: UK Journal of Mines and Minerals No.25 pp31&32. C2050) Crocoite - Adelaide Mine, Dundas mineral field, Zeehan District, Tasmania, Australia Size: 2.0 x 2.0 x 1.1 cm (thumbnail) Price: $ 65
A beautiful and delicate grouping of reticulated orange prismatic matrix-less crocoite crystals. In very good condition - a choice thumbnail for the species! Ex Ralph Clark collection. Ref: Bottrill et al. (2006): Australian Journal Mineralogy. D2054) Dioptase - Tantara Mine, Shinkolobwe, Central area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre) Size: 2.8 x 2.7 x 2.5 cm (thumbnail) Price: $ 750
This is an outstanding full-size thumbnail specimen with a large deep green lustrous terminated crystal of dioptase measuring 1.6 x 1.6 x 1.6 cm in size set on matrix with smaller dioptase crystals. The specimen shows well all around 360 degrees. Damage-free; the crystal is just very slightly translucent when examined closely. This is an enormous crystal for the species that is also of high quality. From an unusual locality that is said to now be abandoned. Ex Ralph Clark collection. Ref: Lapis 17(3), 13-40. E2062) Eudidymite - Lille Arøya, Langesundsfjorden, Larvik, Vestfold, Norway Size: 2.5 x 2.2 x 2.0 cm (thumbnail) Price: $ 1500
Eudidymite is an uncommon sodium beryllium silicate, generally found as a late stage mineral in alkalic nepheline syenite pegmatites. Crystals are commonly twinned and can measure to 5.0 cm, but this is very rare. The full-sized thumbnail shown here is outstanding for the species. Colorless translucent sharp undamaged crystals to 1.6 cm in size are forming an aesthetic grouping without matrix. The quality is outstanding for the species. From the type locality. Ex Ralph Clark collection. Ralph's label notes that the specimen was a gift to the Oslo, Norway museum on May 16, 1892 by Anden Stoksiind. Ref: Brøgger, W.C. (1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit-und Nephelinsyenite. Zeitschrift für Kristallographie und Mineralogie 16. 663 pp + 28 plates. M2074) Mimetite - Pingtouling Mine (Dashuihu Mine), Liannan Co., Qingyuan Prefecture, Guangdong Province, China Size: 2.2 x 2.2 x 1.0 cm (thumbnail) Price: $ 500
This mine was first discovered in 1952. It was worked for many years, then left to flood. In 1999 a former miner bought the rights to the mine and reopened it. In August 2002 and throughout 2003 outstanding pockets of fine mimetite were recovered. Today good specimens are rarely seen in China, and prices are very high. The large full-size thumbnail shown here is superb, featuring a single loose lustrous dark yellow skeletal crystal. Complete all around and in excellent shape. These will definitely be future classics! Ex Ralph Clark collection. Ref: The Mineralogical Record 38(1), 23-30. N2075) Narsarsukite - Poudrette quarry, Mont Saint-Hilaire, Rouville Co., Québec, Canada Size: 2.1 x 1.9 x 0.2 cm (thumbnail) Price: $ 1000
Narsarsukite is a rare silicate mineral that rarely forms crystals to 3.0 cm in size. The example shown here is outstanding for the species! A flat tabular yellowish single loose crystal, complete all around, and without matrix. The size of this crystal is very large; the degree of perfection considering the size of the crystal is very high. Examples such as this, for the species, are rarely seen available on today's market. Ex Ralph Clark collection. Ref: The Mineralogical Record: 21: 284-359. P2082) Pyromorphite - Friedrichssegen Mine, Frücht, Bad Ems District, Lahn valley, Rhineland-Palatinate, Germany Size: 2.3 x 2.2 x 2.1 cm (thumbnail) Price: $ 2250
Located near Frücht, about 4.5 km SW of Bad Ems, this old lead mine is famous for its fine pyromorphite specimens. The mine closed in 1913 and today good examples are highly desired. The superb thumbnail shown here exhibits classic green barrel-shaped crystals of pyromorphite to 1.5 cm in size tightly wrapped around a quartz rich matrix. This is in outstanding shape overall for one of these old classics! Complete all around 360 degrees. Ex Ralph Clark collection. Ralph's label notes taht this was previously in the collection of Braun, circa 1880. Ref: Der Aufschluss Vol. 55, 65-104. S2099) Szenicsite - Jardinera No. 1 Mine, Inca de Oro, Chañaral Province, Atacama Region, Chile Size: 3.5 x 2.5 x 0.8 cm (miniature) Price: $ 2500
Szenicsite is a rare copper molybdate, discovered by Terry Szenics in the early 1990's. The occurrence was an isolated area, about 1 cubic meter in size. It is not common in today's world that new mineral species are discovered that are actually beautiful and with large crystals. The specimen shown here is excellent. Deep green lustrous platy crystals of szenicsite to 1.0 cm in size are completely covering a flat matrix plate. As clean of damage as these get; under a microscopic I can find a few crystals that are not terminated. Overall in very good condition damage-wise. This is excellent for the species and very attractive! Ex Ralph Clark collection. Ref: The Mineralogical Record (1994), 25(1), 76; The Mineralogical Record: 28: 387-394.
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