
åã¢ããªã«å ±ååœã®ãŠã§ãã»ã«ãºé±å±±ç£ã€ããµã€ã - ãã¡ã³ãšããªã¥ã¹ç¶ãã¬ãŒãã«èµ€ããµãŒã¢ã³ãã³ã¯ã®éæãªçµæ¶æ¿ãè²ãåçš®ãã«ã©ããªç£å°ãšããŠé«ãè©äŸ¡ãããã
Key facts
Wessels Mine ã® inesite ã¯ã«ã©ããªæ manganese ãã£ãŒã«ãã§æãé åçãªåéå®¶åãçš®ã®ã²ãšã€ã§ãïŒèµ€ãããµãŒã¢ã³ãã³ã¯ãå æ²¢ããããç©å±€ãã¡ã³ãæŸå°ç¶ã®æ£åžãåçç¶ã®ãããŒã«ããè±ããªããªã¥âç¶ãã¬ãŒããšããŠãéãåç¶ããéç¶ã®ã¢ãŒã¹ç³»ã·ãªã±ãŒãé±ç©ãæè¯ã®æšæ¬ã¯åçã§æãã«ããå ãæŸã¡ãŸãâçµæ¶ç¹ç¶ãå¯ã«æŸå°ç¶ã«ãªããšãã¯åéæã®åãçµ¹ã®ãããªã·ã£ãã€ã³ããªèŒãããåãèªç±ã«ç«ã€ãšãã¯ããã·ã£ãŒããªã¬ã©ã¹å æ²¢ãèŠããŸãã

åç: Wikimedia Commons / Rob Lavinsky, iRocks.com
ç£å°ã®è©å€ã¯è²ã ãã§æ±ºãŸããã®ã§ã¯ãããŸãããWessels ã¯åã¢ããªã«åéšã±ãŒãå·ã® Hotazel å°åã«ããå°äž Mn é±å±±ã§ãNorthern Cape ã®ã«ã©ã㪠Mn ãã£ãŒã«ãåéšã«äœçœ®ããŸããé±ç³äœã¯ Hotazel Formation ã«å±ãããã³ã¬ã³è±å¯ãªå±€ããã³ãéå±€ãšèµ€éå±€ã®å±€ç¶å±€ãšäº€äºã«æåšããŸããWessels ãæåã«ãªãæ¡éé±ç©ã¯ãè€éãªåŸå€©çäœçšã§åœ¢æãããŸããïŒç±æ°Žæ§æ¹å€ãåçãã³ã¬ã³é±ãæ¹è³ªãã空éãšè£éãéããã«ã«ã·ãŠã ããã³ã¬ã³ãããªãŠã ãã¹ããã³ããŠã ãããŠçŽ ãå«ãçš®ã®å¯ãªç³»åãçã¿åºããŸããã
inesite ã®åéå®¶ã«ãšã£ãŠ Wessels ãéèŠãªã®ã¯ãåäžã®æ§åŒã§ã¯ãªãè€æ°ã®èªèå¯èœãªã¹ã¿ã€ã«ãçã¿åºããããšã§ããå€ãçºèŠã®ãã§ãªãŒã¬ããè²ãšæ·±ããµãŒã¢ã³è²ã®ã¹ãã¬ãŒãå éšæŸå°ç¶æ§é ãæã€åéæã®äžžãåçãããæ¿åãªãã¬ãŒãçµæ¶ã®çžäºæé·ãã¬ãŒããNatroliteãOrlymaniteãXonotliteãCalciteãGypsumãApophylliteãQuartzãDatolite ãå«ã rarer ãªçµåãæšæ¬ãªã©ãã¯ã©ã·ãã¯æšæ¬ã«å«ãŸããŸãã1980幎代åé ã®é¡èãªãã±ããã¯ãæãèŒåºŠãé«ãæãèµ€ãæšæ¬ãç¹ã«èšæ¶ãããŠããããã®ã¹ã¿ã€ã«ã®æšæ¬ã¯é·ãé«å€ã§ååŒãããŠããŸããã

åç: Wikimedia Commons / Rob Lavinsky, iRocks.com
Wessels ã® inesite ã®æé«åè³ªæšæ¬ã¯ãã£ããããæšæ¬ãšããŠã¯å€§ããã¯ãããŸããããèŠèŠçã«ã¯åŒ·åã§ãã3 cm ã®ãµã ãã€ã«ã§ãã飜åãããã§ãªãŒã«ã©ãŒãã·ã£ãŒãã§ããåã®åãæå·ã®ãªãçµæ¶æ«ç«¯ãåããŠããã°æ¬æ Œçãªæšæ¬ã«ãªãããŸãããã倧ããªããã¢ãã¥ã¢ãå°åãã£ããããçŽã®æšæ¬ãåãåºæºã§è©äŸ¡ããã宿ããçç¶éåäœãCalcite ãŸã㯠Natrolite ãšã®çœãšèµ€ã®ã³ã³ãã©ã¹ããæšæ¬ãèªç¶ã«èŠããåºè³ªã远å ã®è©äŸ¡å¯Ÿè±¡ãšããŠéã¿ãæã¡ãŸãã## Featured Specimens
Search for specimens: View all inesite specimens from Wessels Mine, South Africa
Wessels Mine is a manganese mine near Hotazel in the Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa. Mindat gives the locality coordinates as 27° 6' 48" S, 22° 51' 15" E, and records the operation as beginning in May 1973. The mine is underground, roughly 300 metres below surface, reached by a vertical shaft and two incline shafts, and worked by a mechanised room-and-pillar, or bord-and-pillar, method.






The broader deposit is part of the Kalahari Manganese Field, a giant Paleoproterozoic manganese province hosted by the Hotazel Formation of the Transvaal Supergroup. In regional terms, Wessels sits in the northern, high-grade portion of the field. The economically important Wessels-type ore is the coarse, shiny, locally vuggy, high-grade manganese ore dominated by hausmannite and braunite-II assemblages, contrasting with the lower-grade, carbonate-rich Mamatwan-type ore farther south.
The geological key for collectors is hydrothermal alteration. Primary manganese-rich sedimentary ore was upgraded and transformed along fault systems, especially north-south and east-west normal faults. That process did more than improve ore grade: it generated open spaces and chemically unusual micro-environments where a remarkably diverse mineral suite could crystallize. Wessels is consequently not just a manganese mine with a few pretty species; it is one of the great locality names in systematic manganese mineralogy.
Access is not casual field-collecting access. Wessels is an active industrial underground mine, operated as part of Hotazel Manganese Mines. Collector specimens historically came out through mine-related recoveries, controlled handling of vug material, and later redistribution through South African collectors, dealers, and older collections. Today, most available inesite specimens are recycled classic pieces, ex-collection material, or specimens dispersed through auctions and dealer inventories rather than fresh, open-access collecting.
The best inesite finds span several periods. Collectors recognize material from the 1970s, an especially valued early 1980s cherry-red pocket, and late-1980s to early-1990s pockets that produced unusual associations, including natrolite-on-inesite and deep cherry-red inesite on orlymanite. A documented Wessels inesite specimen from 1998 shows that attractive material continued to appear after the earliest classic finds, but the localityâs market identity is still strongly tied to older production.泚ç®ãã¹ãé¢é£ ë°ê²¬ã«ã¯ãã«ã«ãµã€ããå«ãã€ããµã€ããã³ããã©ã€ãããããããµã€ã¢ãã©ãªã©ã€ã-(K)ããããã©ã€ããããã©ã€ãããªãªãŒãã³ç³ãç³èãé·ç³ãæ¹è§£ç³ããã¯ãã©ã€ãããªã€ã©ã€ãããã ãœã³ç³-CaããããŠææèŠãããããã³ã¯ããµã€ããæãããããããåºãã«ã©ããªã®æèã§ã¯ããŠã§ãã»ã«ãºã¯ä»ã«ãå€ãã®æšæ¬ã³ã¬ã¯ã·ã§ã³ãåžå°çš®ã«ãšã£ãŠéèŠã§ããããšããªã³ã¬ã€ã矀é±ç©ãã¹ã®ãªç³ãã¹ãã¥ãŒããã€ããã³ããã©ã€ããã¯ãããã©ã€ããããã¿ã€ãããŽãŒãããã€ç³ããããŠããã€ãã®å localityïŒã¿ã€ãã»ããŒã«ãªãã£ïŒãéåžžã«çããçš®ãå«ãŸããã## ãŠã§ãã»ã«ãºé±å±±ïŒåã¢ããªã«ïŒç£ã®ã€ããµã€ãã®ç¹åŸŽ
classic Wessels habit is bladed inesite in stacked, fan-shaped, parallel groups and aggregates. Individual crystals are commonly chisel-shaped, with the blades arranged into sprays, rosettes, hemispheres, and locally compact plates. In fine specimens, the crystal surfaces are lustrous enough to show a wet, glassy gleam; in more fibrous radial aggregates, the luster becomes silky and chatoyant.
Color is the first quality factor. Wessels inesite ranges from pale pink and rose to salmon-red, cherry-red, orange-red, and deep pinkish red. Pale material can be attractive if the crystal form is sharp and the association is strong, but the market strongly favors saturated red and deep salmon-pink. The most coveted early-1980s pocket pieces are remembered as more lustrous and redder than most other Wessels material.
Size varies by style. Thumbnail specimens around 2â3 cm can be excellent if they show sharp, complete sprays. Miniatures in the 4â6 cm range are common enough to be obtainable but still desirable when richly covered. Better small-cabinet pieces around 7â10 cm are much scarcer, especially when they show multiple intact spherical aggregates or strong contrasting associations. Individual crystal blades are often only a few millimetres, but documented Wessels pieces show inesite clusters exceeding 1 cm, spherical aggregates up to several centimetres, and larger matrix plates coated on one or both sides.
Association is central to the localityâs personality. Natrolite gives the most dramatic contrast: white, pearly to sparkly lath-like sprays bursting from rose-red inesite vugs. Calcite may appear as white accents or caps on red hemispheres. Xonotlite can form fibrous white caps or fringes. Hydroxyapophyllite-(K), apophyllite-group crystals, quartz, gypsum, and datolite add glassy or colorless accents. Orlymanite-associated pieces are particularly important because the red inesite may sit on or among tan orlymanite, adding both rarity and locality significance.

A top Wessels inesite should have strong color, crisp bladed form, undamaged exposed terminations, and visible depth in the aggregate rather than a flat fuzzy coating. The best specimens look architectural: fans rise in layers, hemispheres reveal radial internal structure, and contrasting minerals frame the inesite rather than hiding it. Flat plates of broken or rubbed crystals are far less desirable, even if the color is good.## ã³ã¬ã¯ã¿ãŒããŒã
Wessels inesite ã¯æ¥åžžçãªåã§ã¯ãªããã¯ã©ã·ãã¯ãªæšæ¬ã§ãã locality ãé·å¹Žé±ç©åžå Žã«ããããè¯å¥œãªå°åæšæ¬ã¯å ¥æå¯èœã§ãããæé«å質ã®ãã±ããããã®ãããã»ãµã³ãã«ã¯å®¹æã«ã¯å ¥æã§ããŸãããå€ãã©ãã«ã®æšæ¬ãç¹ã«åã¢ããªã«ã欧å·ããŸãã¯ã¢ã¡ãªã«ã®æåã³ã¬ã¯ã·ã§ã³ç±æ¥ã®ãã®ã¯ãæ¡éææããã±ããã®ã¹ã¿ã€ã«ãèšé²ããŠããããšãå€ããç¹å¥ãªæ³šæãå¿ èŠã§ãã
ç¶æ ãäž»ãªå®çšçåé¡ã§ãã inesite ã®ãã¬ãŒãã¯èããWessels ã®äœåã®å€ãã¯é²åºããå 端ã倿°ããå¯éã¹ãã¬ãŒã§æ§æãããŠããŸããããããçžã®æ¬ ããæ¥è§Šè·¡ã¯å€ãæšæ¬ã§äžè¬çã§ããåºæ¿ä»ãæšæ¬ã§ã¯ããã¡ã³ã®é«ç¹ãšåçç¶ã¯ã©ã¹ã¿ãŒã®çžãç¹æ€ããŠãã ããããã¬ãŒãã§ã¯ãçµæ¶ã®å ŽãæŠãæžã£ãŠå¹³åŠåãããŸãŒã³ãæ¢ããŸããå€ãWesselsçŽ æã§ã¯åšèŸºã®å°ããªæå·ã¯èš±å®¹ãããããšããããŸãããäžå¿éšã®å£ãããã¡ã³ãèµ€è²è¡šé¢ã®ç è£ã¯äŸ¡å€ãå®è³ªçã«äœäžãããŸãã
è²ã¯äžæ§å ã®äžã§è©äŸ¡ããŠãã ãããæ·±ããã§ãªãŒè²ããµãŒã¢ã³ã¬ããã®åäœã¯è©äŸ¡ãé«ãã§ãããåçã§ã¯å®ç©ããèµ€ãèŠããããšããããŸããéã«ãçµ¹ã®ãããªåŸæ¹åã®éåäœã¯ã1 æã®éæ¢ç»åã§ã¯éãèŠããããšããããŸãããå転ããããšçãçããšããŸããé æ¹ã§è³Œå ¥ããå Žåã¯ãæ¥å äžãŸãã¯äžæ§LEDã®ç»åãæ±ããçæ³çã«ã¯è¶ã瀺ãçãåç»ããé¡ãããŠãã ããã
consulted ã®æ å ±æºã«ã¯ãWessels ç¹æã®åœé inesite ã®åé¡ã¯æããã«ã¯çŸããŠããŸãããçŸå®çãªæžå¿µã¯ã誀åå®ãå Žæã®äžç¢ºå®æ§ã§ããä»ã®ç£å°ã®ãã³ã¯ç³»ãã³ã¬ã³çªé žå¡©ã¯ãã«ãžã¥ã¢ã«ãªãªã¹ãè¡šç€ºã§æ··åãããããšããããŸãããinesite ã¯äžåœã® Daye/Fengjiashan å°åããBroken Hill ã Hale Creek ã®ãããªå€å žçç£å°ãªã©ãä»ã®éèŠãªç£å°ã§ãç£åºããŠããŸããWesselsæã¯éåžžãã«ã©ããªç 岩ãšã®é¢é£æ§ânatroliteãxonotliteãorlymaniteãdatoliteãhydroxyapophyllite-(K)ãcalciteããããŠç¹åŸŽçãªèµ€ããã¬ãŒãç¶ã¹ãã¬ãŒâã§èå¥å¯èœã§ãããã©ãã«ã¯åŒãç¶ã粟æ»ããŠãã ããã
åŠçåŠçã¯éåžžãWessels inesite åžå Žã«ã¯å«ãŸããŸãããæ²¹ã®ãããªå æ²¢ã®è¡šé¢ãåºæ¿äžã®èµ€è²ãçãããåäžããããã¯èµ€è²é¡æãäºè£ã«æãŸã£ãŠããæšæ¬ã¯é¿ããŠãã ãããç¹ç¶ç¶ãŸãã¯ãã¬ãŒãç¶ã®éåäœãšåæ§ãéåºŠã®æž æã¯æ®çç©ãæ®ãããã埮现ãªçµç«¯ã倱ããããããããšããããããåºè³ªãšé¢é£çš®ã確信ã§ããªãéããç¹çŽ°ãªæšæ¬ã浞挬ããªãã§ãã ãããç³èã«é¢é£ããæšæ¬ã¯ãå²ç¹ã»é£æ¥ããç³èãæãããå·ã€ããããã®ã§ç¹å¥ãªæ³šæãå¿ èŠã§ãã
åžå Žå ¥ææ§ã¯éå±€åãããŠããŸããæ§ãããªãµã ãã€ã«ãå°ããªãããã¥ã¢ã¯å®æçã«çŸããçå£ãªåéå®¶ã«ãšã£ãŠã¯å ¥æå¯èœã§ããè±ããªè²åœ©ã§éãçµæ¶åããããããã¥ã¢ãçŸçãªåºæ¿æšæ¬ã¯ã¯ããã«åžå°ã§ãã倧ããªãã£ããããæšæ¬ãnatrolite- inesite ã®çµã¿åãããorlymanite é¢é£æšæ¬ãåæãã±ããã®èµ€è²ç³»æšæ¬ã®èšé²ç©ã¯äžçŽã³ã¬ã¯ã¿ãŒåãã§ãã## Stories & Field Notes
Wessels inesite ã®ç©èªã¯ãèŠãç®ã§èŠãããããã±ããã®ç©èªã§ããããŸããåæã®1980幎代ã®ãããã±ããã¯ãã¯ãªã¹ã¿ã«ããã ã®ãã³ã¯ã§ã¯ãªããæ¡è²ã§å æ²¢ããããããå®ç³è³ªã ã£ããããåºæºãšãªããŸããããã®ãã±ããããæ¡ãã3 cm x 2.5 cm x 2 cm ã®ãµã ãã€ã«ãµã€ãºã®æšæ¬ã¯ããããã®é±å±±ã§æãå質ã®é«ã inesite ãç£åºããçºèŠããæ¥ããšèª¬æãããŠããŸãããã®ãã¬ãŒãºã¯éèŠã§ããã³ã¬ã¯ã¿ãŒã¯ä»ããã®ã¹ã¿ã€ã«ãèªèããŸãïŒæ®éã® Wessels çŽ æãããå æ²¢ããããè²ãããèµ€ããããé«äŸ¡ã§ãã
å¥ã®èšæ¶ã«æ®ãã¹ã¿ã€ã«ã¯1970幎代ã®ãã®ã§ãããããã®æšæ¬ã¯ãã°ãã°èµ€ãçäœãŸãã¯åçäœãšããŠçŸããå転ããããšæŸå°ç¶ã®åãçµ¹ã®ãããªèŒããæŸã¡ãŸãã1970幎代ã®çºèŠããã®2.7 cm x 2.1 cm x 1.4 cm ã®æç®äŸã¯ãåéæã®åçäœãšããŠèª¬æãããŠãããåŽé¢ããå°ããªåãçªãåºããæ¡å€§èŠ³å¯ã§å éšã®æŸå°ç¶ã® inesite ã®åãèŠãããšãããŠããŸããããã¯ãã±ãŒã¹å ã§éå°è©äŸ¡ãããã¡ãªå°ã㪠Wessels æšæ¬ã®ããããæã«ãããšå¿ããããªãã¿ã€ãã§ãã
1980幎代åŸåã¯ãWessels ã®çµã¿åããã®äžã§ãç¹ã«ç¹åŸŽçãªãã®ã®äžã€ãçã¿åºããŸãããæ·±ãæ¡è²ã® inesite ã ora ly maniteïŒãªãŒãªãŒãã³ç³ïŒã«ä¹ã£ããã®ã§ããRob Lavinsky ã«ãã£ãŠã1980幎代åŸåã®å°ãããŠãŠããŒã¯ãªãã±ããããã5.0 cm x 4.0 cm x 3.5 cm ã®ãããã¥ã¢ãèšè¿°ãããâCharlie saidâ ããã¯åœŒããããŸã§ã«èŠãããšã®ãªãã¹ã¿ã€ã«ã衚ããŠãããšä»èšãããŠããŸããããã®ç¹ã¯åãªãåžå°æ§ã ãã§ãªããä»ã® Wessels inesite ãã±ãããšã¯è²ãšéæåºŠãç°ãªãç¹ã«ãããŸããã³ã¬ã¯ã¿ãŒã埮åŠãªãã±ããç¹æ§ã§æšæ¬ãåé¡ãããã® locality ã§ã¯ããã®ãããªçŸå Žã®èå¥ã¯è²Žéã§ãã
natrolite ã®çµã¿åããã¯ããããæãåçã§ãããã倧ããªæšæ¬ 10.1 cm x 9.2 cm x 6.2 cm ã§ã¯ãçã£çœãª natrolite ã®åŽæ°Žã inesite ã®èã«åããŠäŒžã³ãçœãå㯠3.25 cm ã«éããããŒãºã¬ããã®ãã³ã¬ã³ç¡ é žå¡©ã«å¯Ÿæãã圢ãåã£ãŠããŸããåºå žããŒãã¯ãnatrolite 㯠Wessels ããã³ ã«ã©ããªå šäœã§çšã§ããããšããããŠãã®çµã³ã€ãã®äžã§ãã®å質ãšåœ¢ç¶ã®ãã±ãããäœå®¶ã«ãã£ãŠç¥ãããŠããã®ã¯ãããã1980幎代åŸåãã1990幎代åé ã§ãããšåŒ·èª¿ããŠããŸãããããã®äœåã®äžã§æé«ã®ãã®ã¯ãèµ€ãçµæ¶ã®å£ããçœãé±ç©ã®åŽæ³ãåŽãåºããŠãããã®ãããªå€èгãæã£ãŠããŸãã
ãŸããçãããã»ãšãã©äžå¯èœãšæããç³èæšæ¬ããããŸããæ°Žæ¶ã®ããã«éæãªäºæ¿ç¶ã® gypsum å¥çã«ãéç¶ã® inesite ãå«ãŸããããçºéãã gypsum ã®é¢ãšãè£é¢ã«ã¯ãã«ããŒã§éæãªæ°Žæ¶ãšå ±ã«å®ç³ç¶ã®ã¢ããã£ã©ã€ããæœãã§ããŸãã倧ãã㯠4.2 cm x 3.6 cm x 2.0 cm ãšå€§ããã¯ãããŸãããããŠã§ãã»ã«ãºã®å¥åŠãªçµæãèŠäºã«æããŠããŸãããã³ã¬ã³ç¡ é žå¡©ã®éãæãããªéæãµ sulfate ãŠã£ã³ããŠã«æµ®ãã³ãè£åŽã«ã¯ã¢ããã£ã©ã€ããšæ°Žæ¶ãããŒãã¹ãšããŠçŸããŠããŸãã## é±ç©åŠçèšé²ãšåºçç©
âTUC2457 INESITE, Wessels Mineâ â Crystal Classics â Crystal Classicsã«ããWessels Mineã®ã€ããµã€ãã®çç·šæšæ¬åç»ã## ãããªãèªè§£ãšå€éšãªã³ã¯
Mindat ããŒã«ãªãã£ããŒãž: Wessels Mine â åºç¯ãªããŒã«ãªãã£ããŒã¿ããŒã¹ããŒãžã§ã座æšãé±ç©ãªã¹ããæŽå²ããŒããåçã®ã£ã©ãªãŒãæ²èŒã
Mindat çºçããŒãž: Wessels Mine ã® inesite â çš®ç¹ç°çãªçºçããŒãžã§ã圢ç¶ãè²ãå質è©äŸ¡ãé¢é£æ§ãåèæç®ããªã¹ãåã
Mindat inesite ã®ã£ã©ãªãŒ â äžçã®ä»ã®ããŒã«ãªãã£ãšäžŠã¶ Wessels inesite ã®ã¹ã¿ã€ã«ãæ¯èŒã§ããæçšãªã®ã£ã©ãªãŒã
Wikimedia Commons: Wessels Mine ã«ããŽãª â Wesselsæšæ¬ã®å€§èŠæš¡ãªå ¬éç»åã¢ãŒã«ã€ãã§ãinesite ã®çµã¿åãããå«ãã
Handbook of Mineralogy: Inesite PDF â çµæ¶æ§é ãåãæ±ãããŒããå«ããèŠçŽãããé±ç©ããŒã¿ã·ãŒãã
Major Mines & Projects: Wessels Mine â Wesselsåé±ç³ãšç±æ°Žå€è³ªã匷調ããæ¡é±ã»å°è³ªã®æŠèŠã
South32 Southern Africa operations â åã¢ããªã«ç£ãã³ã¬ã³ã®äºæ¥è æŠèŠãWesselsãšMamatwanãå«ãã
South32 tailings facilities: Hotazel Manganese Mines â Hotazel Mn é±å±±å ã® Wessels ã®çŸåšã®éå¶ç¶æ³ã
The Mineral and Gemstone Kingdom: Inesite â Wessels ãš NâChwaning ãç¹çãã¹ã ã«ã©ããªç£ inesite ããŒã«ãªãã£ãšããŠç޹ä»ãããã¢ã¯ã»ã¹ããããé±ç©æŠèŠã