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Joined: 05 May 2007
Posts: 1531
Location: Catalonia
Posted: Mar 24, 2023 09:42 Post subject: Collection of Carles Millan - Barite from Cerro Warihuyn (Peru)
Barite BaSO4
Group of transparent, greenish-honey colored, tabular barite crystals, most of them showing a parallel growth usual in this locality, with an undefined compact sandy material attached on the back. Undamaged. Acquired in March 2023.
Overall size: 64 mm x 53 mm. Largest crystal size: 54 mm. Mass (weight): 91 g.
Warihuyn Hill, Puños, Miraflores District, Huamalíes Province, Huánuco Department, Peru.
Joined: 05 May 2007
Posts: 1531
Location: Catalonia
Posted: Aug 04, 2023 10:52 Post subject: Collection of Carles Millan - Galena from Bulgaria
Galena PbS, quartz SiO2, chalcopyrite CuFeS2
Group of galena crystals aesthetically grown on a matrix of crystallized quartz. The habit is cubic {100}, but also showing several octahedral faces {111}. The edges and vertices are somewhat rounded, which is unusual for the species. As can be seen in the photos, there are also several tiny chalcopyrite tetrahedrons embedded on the surface of the galena crystals.
Overall size: 76 mm x 71 mm. Largest crystals: galena 14 mm on edge, quartz 38 mm tall, chalcopyrite ~4 mm on edge. Mass (weight): 214 g.
From Madan mining area, Rhodope Mountains, Smolyan Oblast, Bulgaria.
Joined: 05 May 2007
Posts: 1531
Location: Catalonia
Posted: Oct 28, 2023 14:49 Post subject: Collection of Carles Millan - Calcite from Daye (China)
Calcite CaCO3
Glassy gemmy colorless to red complex crystals of calcite set on matrix and measuring to about 50 mm in size. The smaller crystals show a scalenohedral habit while the main have a more complex shape, typical of this species. In perfect condition. The crystals are very brightly fluorescent red as seen in the photo. From a new find of this year 2023. These specimens appeared in the market for the first time in year 2005 (according to Mindat records) with a much more expensive price.
Overall size: 81 mm x 51 mm x 49 mm. Main crystal: 49 mm long. Mass (weight): 144 g.
From Tonglüshan Mine, Edong, Daye, Huangshi Prefecture, Hubei Province, China.
Another calcite specimen from the same locality but found in year 2005 can be seen here.
Joined: 05 May 2007
Posts: 1531
Location: Catalonia
Posted: Nov 03, 2023 04:31 Post subject: Collection of Carles Millan - Tourmaline from Stak Nala
Elbaite (Tourmaline Group) Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) (according to Mindat & IMA)
Group of elbaite crystals with a large doubly terminated main crystal, about 80 mm long and up to 20 mm wide, with fine striations, and set on a matrix formed by a lot of smaller crystals of also doubly terminated tricolor elbaites. The main crystal has a pyramidal termination on the upper tip with a pink color and a flat termination on the other end with a blue-violet color, and the central area of the prism with a green color with different intensities. No damage. The specimen has a pegmatitic origin like the other minerals found in Stak Nala.
From the Piedmontese prominent collector Tiziano Bonisoli, based in Turin.
Dimensions: 80 mm x 40 mm. Largest crystal size: 80 mm. Mass (weight): 74 g.
Description: Sharp, lustrous, gray-brown, translucent tetragonal-bipyramidal crystals of scheelite measuring up to 19 mm in size on a quartz crystal matrix that is mostly coated with sparkling white crystals of dolomite. This is crystallized naturally all around. In very good condition.Dimensions: 71 mm x 54 mm x 54 mm
Largest scheelite crystal: 19 mm vertex to vertex
Mass: 178 g
Locality: Yaogangxian mine, Yizhang, Chenzhou Prefecture, Hunan Province, China.
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