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Aeschynite-(Nd) : (Nd,Ce,Ca)(Ti,Nb)2(O,OH)6, Zircon : Zr[SiO4], Quartz : SiO2 | |
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Chungju deposit, Mt. Eorae, Joongwon-gun, Chungju (Chung Won Kum; Chung-ju), Chungcheongbukdo (Chungchong-pukto), South Korea 8 mm long prismatic aeschynite-(Nd) crystals from small pegmatite weinlet, crosscuting layer of zircon-feldspar-quartz hornfels with abundant finegrained aeschynite-(Nd). Selfcollected in 2001. Pavel M. Kartashov collection and photo. |
| © Pavel M. Kartashov | Photo ID: 106759 View Count: 220 |
Aeschynite-(Nd) : (Nd,Ce,Ca)(Ti,Nb)2(O,OH)6, Ferriallanite-(Ce) : {CaCe}{Fe3+AlFe2+}[O|OH|SiO4|Si2O7], Fluorite : CaF2 | |
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Chungju deposit, Mt. Eorae, Joongwon-gun, Chungju (Chung Won Kum; Chung-ju), Chungcheongbukdo (Chungchong-pukto), South Korea 8 mm long prismatic aeschynite-(Nd) crystals (in the upper right corner of the specimen) in small pegmatite weinlet, crosscuting layer of zircon-feldspar-quartz hornfels with abundant finegrained aeschynite-(Nd). More thick pegmatite veinlet in the opposite side of the specimen has violet fluorite core and dark rim of ferriallanite-(Ce). Matrix ... |
| © Pavel M. Kartashov | Photo ID: 142966 View Count: 172 |
Beryl : Be3Al2Si6O18, Quartz : SiO2 | |
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Tae Hwa Mine (Taehwa Mine; Dae Hwa Mine; Taewha Mine; Tong Wha Mine; Tae Wha Mine), Neungam-ri (Neung Am-ri; Noungam-ri), Angseong-myeon, Chungju (Chung Won Kum; Chung-ju), Chungcheongbukdo (Chungchong-pukto), South Korea Beryl, variety aquamarine and Quartz. M. Bogen collection. Scale at bottom of image is an inch with a rule at one cm. |
| Photo ID: 238172 View Count: 35 | |
Cassiterite : SnO2 | |
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Tae Hwa Mine (Taehwa Mine; Dae Hwa Mine; Taewha Mine; Tong Wha Mine; Tae Wha Mine), Neungam-ri (Neung Am-ri; Noungam-ri), Angseong-myeon, Chungju (Chung Won Kum; Chung-ju), Chungcheongbukdo (Chungchong-pukto), South Korea The cassiterite crystal on this specimen measures 1.2 cm. Ex. Willard Perkin Collection. Specimen and Photo : David Jegou |
| © David JEGOU 2000 | Photo ID: 316 View Count: 728 |
Ferberite : FeWO4 | |
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Tae Hwa Mine (Taehwa Mine; Dae Hwa Mine; Taewha Mine; Tong Wha Mine; Tae Wha Mine), Neungam-ri (Neung Am-ri; Noungam-ri), Angseong-myeon, Chungju (Chung Won Kum; Chung-ju), Chungcheongbukdo (Chungchong-pukto), South Korea An excellent specimen of sharp, iridescent, chevron-shaped ferberite blades from the classic Korean locality, the Tae Wha Mine. 2.6 x 1.6 x 1.0 cm |
| © Rob Lavinsky | Photo ID: 41431 View Count: 259 |
Ferberite : FeWO4 | |
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Tae Hwa Mine (Taehwa Mine; Dae Hwa Mine; Taewha Mine; Tong Wha Mine; Tae Wha Mine), Neungam-ri (Neung Am-ri; Noungam-ri), Angseong-myeon, Chungju (Chung Won Kum; Chung-ju), Chungcheongbukdo (Chungchong-pukto), South Korea Nicely arranged cluster of several terminated lustrous black ferberite crystals. No matrix. RFC M1260. Ex. E. Schlichter Collection. Over all specimen size 4 x 2 x 2 cm. |
| © Michael C. Roarke | Photo ID: 93484 View Count: 143 |
Ferberite : FeWO4, Quartz : SiO2 | |
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Tae Hwa Mine (Taehwa Mine; Dae Hwa Mine; Taewha Mine; Tong Wha Mine; Tae Wha Mine), Neungam-ri (Neung Am-ri; Noungam-ri), Angseong-myeon, Chungju (Chung Won Kum; Chung-ju), Chungcheongbukdo (Chungchong-pukto), South Korea 10.5 x 8 x 5.3 cm. A fine ferberite for this important Korean locale. The piece features a large, 7.5-cm ferberite crystal locked inside gemmy, translucent quartz crystals. Its termination, in fact, extends right up into the crystal on the left side. Ex. Rolf Wein Collection. |
| © Rob Lavinsky | Photo ID: 200972 View Count: 46 |
Ferberite : FeWO4 | |
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Tae Hwa Mine (Taehwa Mine; Dae Hwa Mine; Taewha Mine; Tong Wha Mine; Tae Wha Mine), Neungam-ri (Neung Am-ri; Noungam-ri), Angseong-myeon, Chungju (Chung Won Kum; Chung-ju), Chungcheongbukdo (Chungchong-pukto), South Korea 3.1 x 2.4 x 0.8 cm. This is a fine ferberite crystal from Korea. This is classic old material, now rare. It has perfect form and is nearly pristine, with just a tiny bit of contact on one side. Sharp, glossy termination and gleaming display face. There are some crystals of pyrite and quartz on the backside. |
| © Rob Lavinsky | Photo ID: 217490 View Count: 33 |
Ferberite : FeWO4 | |
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Tae Hwa Mine (Taehwa Mine; Dae Hwa Mine; Taewha Mine; Tong Wha Mine; Tae Wha Mine), Neungam-ri (Neung Am-ri; Noungam-ri), Angseong-myeon, Chungju (Chung Won Kum; Chung-ju), Chungcheongbukdo (Chungchong-pukto), South Korea A lustrous black choice grouping of matrix-less bladed terminated ferberite crystals measuring 5.9 x 3.1 x 2.4 cm in size overall. Completely crystallized all around 360 degrees; slight chipping is present to two crystal terminations on what I would consider the back side of the piece. Overall I think this in good condition and it is undamaged ... |
| © Dan & Diana Weinrich Minerals | Photo ID: 234769 View Count: 26 |
Ferriallanite-(Ce) : {CaCe}{Fe3+AlFe2+}[O|OH|SiO4|Si2O7], Röntgenite-(Ce) : Ca2(Ce,La)3[F3|(CO3)5] | |
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Chungju deposit, Mt. Eorae, Joongwon-gun, Chungju (Chung Won Kum; Chung-ju), Chungcheongbukdo (Chungchong-pukto), South Korea Agregate of Ferriallanite-(Ce) with excess of Fe3+ transitive to new end memeber CaCeFe3+Fe3+Fe2+[SiO4][Si2O7]O(OH). Ferriallanite of such copmposition is rare on the deposit and was formed only near specific andradite skarn spots with hematite. On the photo granular dark-brown segregations of Ferriallanite in the Quartz vein deposited on the ... |
| © Pavel M. Kartashov | Photo ID: 32575 View Count: 429 |
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