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Search for specimens: View all ilvaite specimens from Huanggang Mine, Inner Mongolia, China
Huanggang, also widely seen in the mineral trade as Huanggangliang Mine or simply Huanggang Mine, is in Hexigten Banner, Chifeng City, Inner Mongolia, China. Mindat places the deposit at about 43°36'37" N, 117°25'37" E and lists the locality as a deposit rather than a single small mine. The Chinese locality name is associated with é»å²é¡éç¿åº / é»å²æ¢é¡éç¿åº, reflecting the tin-iron character of the ore system.
Geologically, Huanggang is a skarn-type tin-iron deposit in the southern Great Xingâan, or Greater Khingan, Range. The ore and skarn developed along contact zones between granitoid intrusions and carbonate rocks of the Early Permian Dashizhai and Huanggangliang formations. The district includes multiple intrusions, including the Luotuochangliang intrusion and the 204 intrusion, with skarn, magnetite, cassiterite-bearing mineralization, sulfides, quartz, calcite, fluorite, and a broad suite of calc-silicate minerals distributed through the system.
The deposit is large on a collectorâs scale and on an economic-geology scale. Published descriptions divide the Huanggang area into seven mine or ore zones over a belt roughly 0.5â2.5 km wide and nearly 20 km long. The western part is described as containing several more iron-rich skarn orebodies worked by mines 1â4, while the eastern part contains a tin-rich skarn-lens belt about 6 km long, worked by mines 5â7. A recent synthesis describes 185 discovered orebodies divided into seven ore zones, with individual orebodies ranging from 10 to 1475 m in length, 2 to 118 m in thickness, and plunging to depths of as much as 500 m.
Mining for iron and tin at Huanggang was underway by the early 1990s, with one published Resource Geology paper noting exploitation by Inner Mongolia Huanggang Mining Co., Ltd. beginning in 1993 at skarn zones II and III. Fine collector specimens, however, became internationally prominent much later. The first major wave of Huanggang collector material appeared around 2010, led by ilvaite, followed by fluorite, quartz, arsenopyrite, calcite, helvine-group minerals, borates, and other skarn specimens.
The locality is a working mine complex, not a casual collecting site. Field collecting access should be regarded as restricted and dependent on mine permission, local regulations, and active industrial conditions. Most collector specimens have reached the market through miners, Chinese dealers, and international mineral dealers rather than through recreational collecting.é»å²ã©ãã«ã¯æ³šç®ã«å€ããŸããå€ãã©ãã«ã«ã¯ãå é åºïŒBaotou DistrictïŒããšèšãããŠããããšããããçŸåšãã®ææã«ã¯èª€ããšèŠãªããã locality 衚çŸã§ãããé»å²ããé»å²äº®ããé»å² Fe-Sn é±åºãããã³çªå·ä»ãé±å±±ã©ãã«ã¯åžå Žã«çŸããããšããããŸããæãæçšãªã©ãã«ã¯ãæ å ±ãä¿¡é Œã§ããå Žåã«é±å±±çªå·ãŸãã¯é±åºåãå«ã¿ãŸãããå€ãã®æšæ¬ã¯æ£ç¢ºãªãµããã±ãŒã·ã§ã³æ å ±ãåºãçè§£ããã以åã«æµéããŠããŸããã## Huanggangé±å±±ïŒå ã¢ã³ãŽã«ãäžåœïŒç£ã€ã«ãŽã¡ã€ãã®ç¹åŸŽ
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å質ã¯çµæ¶ã®å®å šæ§ããå§ãŸããŸããæé«ã®Huanggangã€ã«ãŽã¡ã€ãã¯çµç«¯ãå®å šã§ãçžãéããæå·ãæå°éã§ããå æ²¢ã決å®çã§ãæããå æ²¢ã®ããçµæ¶ã¯ã倧ãããŠéããŸãã¯çްãã衚é¢åŠçã®ãã®ãããã¯ããã«æãŸããããšããããŸããæ¬¡ã«åœ¢ç¶ã§ããèªç«ããããªãºã ãæŸå°ç¶ã®ç°ãã€ã«ãŽã¡ã€ã-ç³è±ã®çµæãåæŽã®ãšãããã®ã¯ãå¡ç¶ãŸãã¯æ··ã¿åã£ãéåäœãããäžè¬ã«æãŸããã§ãã察æ¯ãéèŠã§ããã€ã«ãŽã¡ã€ãã¯é»è²ã§ãããããæè¯ã®åã¯çµæ¶ãå ãã®ã§ã¯ãªããæ·¡è²ã®ç³è±ãæ¹è§£ç³ããããã¯ãªãŒãã³ãããªã¯ã¹ãçšããŠçµæ¶ãåŒãç«ãŠãŸãã衚é¢ã®è³ªæã¯å€§ããç°ãªããŸããããã€ãã®çµæ¶ã¯é¡é¢ã®ãããªé¢ãæã¡ãéæ®µç¶ã®ãç¹ç¶ç¶ã®ããŸãã¯åºç¶ã®æé·ã瀺ããã®ããããŸããã»ãã®ãã®ã¯ãšããã³ã°ãããŠãããããããã«ãããã§ããããã¯èªåçã«æ¬ é¥ãšããããã§ã¯ãããŸããâé»å²¡ã€ã«ãŽã¡ç³ã«ã¯èªç¶ã«è€éãªè¡šé¢ãããããšããããŸãããã³ã¬ã¯ã¿ãŒã¯æ¡æåŸã®æŠå·ãæè£ãã端éšãçžã®æ©èãšèªç¶ã®æé·è¡šé¢ãšãåºå¥ããã¹ãã§ãã## Collector Notes
Huanggang ilvaite is common enough in todayâs market that a collector can usually find an example, but truly fine specimens remain scarce. The mine produced enough material to establish a recognizable âmodern classicâ style, yet top cabinet pieces with strong luster, intact terminations, and aesthetic quartz or calcite association are much less abundant than ordinary single crystals or damaged clusters.
The main authenticity issue is not artificial treatment so much as labeling and association. Huanggang material has been mislabeled historically as âBaotou District,â and the name âHuanggang Mineâ is often used broadly for a multi-mine Fe-Sn deposit rather than for a precisely documented sublocality. If a specimen is sold as No. 1, No. 2, No. 4, or another specific mine, the label is only as good as its chain of custody. Older pieces may also carry generalized âInner Mongoliaâ labels because the locality was poorly understood when the first specimens appeared on the market.
There are also mineral-identification traps around Huanggang skarn specimens. Mindat notes that some specimens sold as hedenbergite from the deposit proved analytically to be amphiboles, and that some datolite sold as Huanggang material may actually come from a mine near Linxi. For an ilvaite specimen, the black ilvaite itself is usually visually distinctive, but the associated âhedenbergite,â âandradite,â âgenthelvite,â âhelvine,â or âdatoliteâ should be treated carefully if the association adds significant value.
Condition is the most important buying discipline. Ilvaite is not especially fragile compared with very soft or fibrous minerals, but large Huanggang crystals often have exposed corners, splintery prism edges, and complex terminations that chip easily during mining, trimming, washing, and shipping. Check the termination under magnification, then examine the long prism edges for fresh gray chips. On clusters, look into the recesses: broken stubs may be hidden by dark color and complex growth. Quartz on ilvaite terminations can also disguise small contact points, so evaluate whether the quartz is natural overgrowth, natural etching, or damage.
Some Huanggang ilvaite has natural matte or etched areas, and not every dull patch is damage. A fair evaluation asks whether the surface is consistent across crystal growth features or whether it interrupts edges and terminations in a way that suggests abrasion. For display, the highest premium goes to specimens that are naturally complex but visually clean: glossy black crystals, undamaged terminations, good contrast, and a composition that stands without awkward trimming.åžå Žã®äŸçµŠã¯å¥å šãªãŸãŸã§ããå°ããªåæ¶ããããã¥ã¢ã¯æ¯èŒçæé ã§ãããåªãããããªãã¯ã¹ãããã¥ã¢ãå°åãã£ããããæšæ¬ã¯äŸ¡æ Œãæ¥éã«äžæããŸããè€æ°ã®å æ²¢ãããå·ã®ãªãçµæ¶ãšé åçãªç³è±ãæ¹è§£ç³ãåãã倧åãã£ããããæšæ¬ã¯çŸä»£ã®å®çªã§ãããå€ãç£å°ã®ããäžè¬çãª_ilvaite_ ãšã¯ç°ãªããæå€§ã®é»åŽïŒ Huanggang ïŒã®äŸãšæ¯èŒããŠè©äŸ¡ãããã¹ãã§ãã## Stories & Field Notes
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ãã®åæã®æ··ä¹±ã¯ãå€ãã®å€ãã©ãã«ã説æããŸããé»å²¡ã¯å®æãããã¢ãã°ã©ããšæŽã£ãé±å±±å°å³ãéããŠåžå Žã«ç޹ä»ãããã®ã§ã¯ãªããæšæ¬ãéããŠå°æ¥ããŸãããã€ãªãµã€ãã¯å é§çãªçš®ã§ããã西æŽã®ã³ã¬ã¯ã¿ãŒã®æ³šæãåŒãé»ãçµæ¶ã§ããããã®åŸã§åããŠãèç³ãããªã»æ§ã®ç³è±ãæ¹è§£ç³ãç äºç ·é±ããã«ãŽã¡ã€ã³æé±ç©ãããç³ããããŠç°äŸã®ã¹ã«ã«ã³å ±çãªã©ãå šäœåãçµã³ã€ããå°åºã®ããåºãåäžæ§ãæµ®ãã³äžãããŸããã## é±ç©åŠçèšé²ãšåºçç©- Berthold Ottens and GÃŒnther Neumeier, âThe Huanggang mine, Inner Mongolia, China,â The Mineralogical Record, 43(5), 529â563, 2012. å°åã«é¢ããã³ã¬ã¯ã¿ãŒå¿åã®ä»£è¡šçãªè«æã§ãå蚪åãéããããã§é±å±±è€åäœãšæšæ¬é±ç©ã«çŠç¹ãåœãŠãŠããã
ResearchGate record for Ottens and Neumeier, âThe Huanggang mine, Inner Mongolia, China,â The Mineralogical Record, 43(5), 529â563, 2012. 2010幎ã«ã³ã¬ã¯ã¿ãŒåžå ŽãžåããŠçŸããé«å質㮠Huanggang ilvaite ã瀺ãæçšãªèŠçŽã
Li Juan Wang, Hidehiko Shimazaki, and Yoshihide Shiga, âSkarns and Genesis of the Huanggang Fe-Sn Deposit, Inner Mongolia, China,â Resource Geology, 51(4), 359â376, 2001. ã¹ã«ãŒã³åºåž¯ãé±ç³é±äœãè±åŽå²©äŸµå ¥ãããã³é±åºã®çæã«é¢ããåºç€çãªçµæžå°è³ªåŠè«æã
Open repository record and PDF for Wang, Shimazaki, and Shiga, 2001. åã Resource Geology ç ç©¶ã®ãªããžããªã¢ã¯ã»ã¹ãå®å šãª PDF èšé²ãå«ãã
Wei Mei et al., âOre genesis and hydrothermal evolution of the Huanggang skarn ironâtin polymetallic deposit, southern Great Xingâan Range: Evidence from fluid inclusions and isotope analyses,â Ore Geology Reviews, 64, 239â252, 2015. éæŸã¢ã¯ã»ã¹ã®ç ç©¶ã§ãã¹ã«ãŒã³ãé žåç©ããã³ç¡«åç©æ®µéãšé±ç³åœ¢ææµäœã®é²åãèšè¿°ã
Hanwen Xue et al., âOre Genesis of the Huanggang Iron-Tin-Polymetallic Deposit, Inner Mongolia: Constraints from Fluid Inclusions, HâOâC Isotopes, and U-Pb Dating of Garnet and Zircon,â Minerals, 15(5), 518, 2025. å°ç幎代åŠãæµäœå æç©ããŒã¿ãé±å段éãé±åºæ å ±ãçµ±åããæè¿ã®ç·èª¬ã
D. I. Belakovskiy et al., âNew acquisitions to Fersman Mineralogical Museum in 2011â2012,â New Data on Minerals, 48, 2013. Huanggang ilvaite ã®çµæ¶ãçŽ 10 cm ã§åŒ±åé¢ããã¯ã©ã¹ã¿ãŒãšããŠå¯èŽãããèšé²ãD. I. BelakovskiyãFersman Mineralogical Museum No. 93759ã
Mindat reference page for Ottens and Neumeier, 2012. Mineralogical Record è«æãš Huanggang No. 1 é±å±±ã®é±ç©ãšã³ããªïŒilvaiteã quartzã calciteã fluoriteã magnetiteã hedenbergiteã helvineã arsenopyriteã garnet ãªã©ïŒãçµã³ã€ããã
Mindat entry for ilvaite from No. 1 Mine, Huanggang Fe-Sn deposit. No. 1 é±å±±ãµãããŒã«ãªãã£ã«ããã ilvaite ã®ç¹å®ã®åºçŸããŒãžã
Mindat entry for ilvaite from No. 2 Mine, Huanggang Fe-Sn deposit. No. 2 é±å±±ã®åºçŸããŒãžãe for ilvaite at the No. 2 Mine sublocality.## ãããªãèªã¿ç©ãšå€éšãªã³ã¯
Mindat: Huanggang Fe-Sn deposit, Hexigten Banner, Chifeng City, Inner Mongolia, China â 座æšãå¥åãé±ç©ãªã¹ããé±å±±åºåãã©ããªã³ã°åé¡ã«é¢ããæé«ã®ãªã³ã©ã€ã³ã®åäžããŒã«ãªãã£åç §ã
John Chen, âChina Minerals trip: HuangGang mine, Keshiketeng Qi, ChiFeng, Inner Mongolia, 2011â â 2011幎6æã®èšªåæã®åæçŸå°ããŒããæšæ¬åžå Žãžã®ããŒã«ãªãã£ã®å ¥ãæ¹ãçè§£ããã®ã«æçšã
Marin Mineral Company: Ilvaite from Huanggang Mine, Inner Mongolia, China â Huanggang ilvaite ã®è¶ã®ããé»è²ããããã¯ç¶ã¹ã¿ã€ã«ã瀺ããã£ãŒã©ãŒæšæ¬ããŒãžã
Mindat specimen UJF-VMD: Ilvaite, Quartz from Huanggang â 寞æ³ãšèšè¿°ããŒããå«ã倧ã㪠ilvaite-ã€ã quartz æšæ¬èšé²ã
Fabre/Mindat specimen R4A-914: Quartz var. prase with ilvaite, found in 2012 â Huanggang ã®ç·è²ç³è±ãšé»é²æ¯éé±ã®çµæã®å€å žçé¢ä¿ã®æçšãªèšé²ã
FossilEra: 1.7-inch black ilvaite crystal from Huanggang Mines â åžå Žæèãšå žåçãªå°åçµæ¶ææã®å ¥æå¯èœæ§ããŸãšãããã£ãŒã©èŠçŽã
MineralAuctions: Ilvaite with hedenbergite, ex Dr. Barratt Phillips Collection â æŸå°ç¶ã® Huanggang ilvaite ã¯ã©ã¹ã¿ãŒã®èšé²ãšç±æ¥ã»ç¶æ ã®æ³šèšã
Khyber Minerals: Ilvaite, Huanggang Mine â åžå Žã§å€§ããªåœ±é¿ãäžããæåã® Huanggang é±ç©ãšã㊠ilvaite ãæãããã£ãŒã©ãŒã¢ãŒã«ã€ãã2010幎ãã¥ã³ãã³åºçŸã