Wavellite is a hydrated aluminum phosphate celebrated for its radiant, starburst crystal habit. ã¯ãŽã¡ã©ã€ãã¯ãæ°Žåæ§ã®ã¢ã«ãããŠã ãªã³é žå¡©ã§ãæŸå°ç¶ã®çµæ¶åœ¢ã§èŒãããšã§ç¥ãããŠããŸãã
It most often forms hemispherical to spherical aggregates of tightly packed, acicular crystals that radiate from a central point, yielding âfireworkâ cross-sections and velvety-sparkling surfaces. æãäžè¬çã«ã¯ãäžå¿ç¹ããæŸå°ç¶ã«çµã°ãããå¯éããéç¶çµæ¶ã®åçç¶ããçç¶ã®éåã圢æããè±ç«ã®ãããªæé¢ãšãã«ãããã®ããã«èŒã衚é¢ãçã¿åºããŸãã
Classic colors range from fresh apple- to emerald-green, with variations spanning yellow, blue-green, colorless/white, and rarely darker greens or browns. æšæºçãªè²ã¯ãæ°é®®ãªãªã³ãŽè²ãããšã¡ã©ã«ãã°ãªãŒã³ãŸã§ã§ãé»è²ãéç·ãç¡è²/çœããããŠçšã«ããæ¿ãç·ãè¶è²ãžãšå€åããŸãã
Luster shifts from silky (on fibrous hemispheres) to glassy (on open, radiating sprays), and translucency can be superbâtop pieces glow with backlighting. å æ²¢ã¯ãç¹ç¶ç¶ã®åçã§ã¯çµ¹ã®ããã«ãéæŸçãªæŸå°ç¶ã¹ãã¬ãŒã§ã¯ã¬ã©ã¹ã®ããã«å€åããéæåºŠã¯åè¶ããŠãããäžè³ªãªæšæ¬ã¯èå ã§èŒããŸãã
Its preferred settings are aluminous rocks altered by phosphate-bearing fluids: bauxite and laterite pockets, aluminous shales, or limestone/quartz veins that acted as host to secondary phosphates. 奜é©ãªç£ç¶ã¯ããªã³é žå¡©ãå«ãæµäœã«ãã£ãŠå€è³ªããã¢ã«ãããŠã 質岩ç³ïŒããŒãµã€ããšãã¿ã€ã©ã€ãã®ãã±ãããã¢ã«ãããŠã 質é 岩ããŸãã¯äºæ¬¡ãªã³é žå¡©ã宿䞻ãšããç³ç°å²©/ç³è±ã®èã§ãã
Associations commonly include variscite, crandallite-group minerals, strengite, turquoise-group phosphates, kaolinite, quartz, and limonite. ããé¢é£ããé±ç©ã«ã¯ãããªã¹ãµã€ããã¯ã©ã³ãã©ã€ã矀é±ç©ãã¹ãã¬ã³ã°ãµã€ããã¿ãŒã³ã€ãºçŸ€ãªã³é žå¡©ãã«ãªãªãã€ããç³è±ããªã¢ãã€ããæããããŸãã
Collecting appeal lies in the near-unique aesthetics: perfect, undamaged hemispheres displaying sharp radial spokes, zesty color, and strong contrast on matrix (e.g., on tan sandstone, white quartz, or dark shale) make for striking cabinet displays. Prices remain approachable for modest pieces, while deeply colored, gemmy, and undamaged Arkansas and Pennsylvania specimens on attractive matrix can command four- and even low five-figure prices at the top end. åéã®é åã¯ãã»ãŒå¯äžç¡äºã®çŸåŠã«ãããŸããå®ç§ã§å·ã®ãªãåçãéãæŸå°ç¶ã® spokes ãèŠããæŽ»åããè²ãšåºè³ªäžã®åŒ·ãã³ã³ãã©ã¹ããæã€ãããèŠæ ãã®è¯ããã£ãããããã£ã¹ãã¬ã€ã«ãªããŸããæé ãªå€§ããã®æšæ¬ã¯äŸ¡æ Œãæé ã§ãããé åçãªåºè³ªäžã«ããæ·±ãè²åãã§å®ç³çŽã® Arkansas ããã³ Pennsylvania ã®æšæ¬ã¯ãäžäœã§ã¯4æ¡ãããã«ã¯äœã5æ¡ã®äŸ¡æ Œãã€ããããšããããŸãã
Wavellite has been a connoisseur favorite for generations. ã¯ãŽã¡ã©ã€ãã¯äœäžä»£ã«ããããéè³å®¶ã®ãæ°ã«å ¥ãã§ãã
The Arkansas bauxite belt brought worldwide attention with vivid green, lustrous hemispheresâmany now considered classics. ã¢ãŒã«ã³ãœãŒå·ã®ããŒãµã€ããã«ãã¯ãé®®ãããªç·è²ã§å æ²¢ã®ããåçãäžççã«æ³šç®ãããå€ãã¯ã¯ã©ã·ãã¯ãšèŠãªãããŠããŸãã
In the UK, the type locality at High Down Quarry (Devon) secured its historical significance. è±åœã§ã¯ããã€ã»ããŠã³æ¡ç³å ŽïŒããŽã©ã³ïŒã®æšæ¬ç£å°ãããã®æŽå²çæçŸ©ã確ç«ããŸããã
Pennsylvaniaâs Mount Pleasant Mills quarries revitalized interest with lemon-yellow to bright green sprays, while Turkeyâs Hisarcik Mine impressed with unusually rich greens and large hemispheres. ãã³ã·ã«ããã¢å·ã® Mount Pleasant Mills ã®æ¡ç³å Žã¯ãã¬ã¢ã³è²ããé®®ãããªç·ãžã®æŸå°ç¶ã¹ãã¬ãŒã§é¢å¿ãåçããããã«ã³ã® Hisarcik é±å±±ã¯ãç¹ã«è±ããªç·è²ãšå€§ããªåçã§å°è±¡ãæ®ããŸããã
Because wavellite forms in dramatic, radiating clusters that are unmistakable in a display case, collectors often add at least one standout example to a suite of secondary phosphates or to a âtextures and habitsâ case. ã¯ãŽã¡ã©ã€ãã¯ããã£ã¹ãã¬ã€ã±ãŒã¹ã§èŠåããã€ãã»ã©ãã©ãããã¯ã§æŸå°ç¶ã®éåäœã圢æãããããã³ã¬ã¯ã¿ãŒã¯äºæ¬¡ãªã³é žå¡©ã®ã»ãããã質æãšåœ¢ç¶ãã³ã¬ã¯ã·ã§ã³ã±ãŒã¹ã«ãå°ãªããšãäžã€ã®éç«ã€æšæ¬ãå ããããšãå€ãã§ãã
Abundant thumbnails and hand specimens keep the species accessible, yet fine, unmarred hemispheres with strong color remain surprisingly scarceâsupply is patchy as key localities wax and wane. è±å¯ãªãµã ãã€ã«æšæ¬ãšãã³ããµã³ãã«ã¯ãã®çš®ã®å ¥ææ§ãä¿ã¡ãŸãããè²ãæ¿ãå·ã®ãªãçŸããåçã¯æãã®ã»ãåžå°ã§ããäŸçµŠã¯äž»èŠç£å°ã®ç¹æ ãšè¡°éã«ããç¹åšããŠããŸãã
The balance of affordability for smaller pieces and rarity of truly top-tier, undamaged matrix specimens underpins wavelliteâs steady desirability. å°åæšæ¬ã®æé ããšãçã«ãããã¯ã©ã¹ã§å·ã®ãªãåºè³ªæšæ¬ã®çšå°æ§ããã¯ãŽã¡ã©ã€ãã®å®å®ããéèŠãæ¯ããŠããŸãã
Wavellite is widely distributed, but a handful of districts are recognized for producing benchmark pieces prized by collectors. ã¯ãŽã¡ã©ã€ãã¯åºãååžããŸãããã³ã¬ã¯ã¿ãŒã«ãšã£ãŠæšæºãšãªãæšæ¬ãç£åºããå°åã¯éãããŠããŸãã
Mount Pleasant Mills is renowned for lemon-yellow to bright green wavellite in open, radiating sprays as well as compact hemispheres. The limestone-hosted occurrences yield vivid contrastâgreen or yellow radial stars scattered over pale matrix or lining pockets with additional phosphate species. Mount Pleasant Mills ã¯ãéæŸçã§æŸå°ç¶ã«åºããã¹ãã¬ãŒãšãå¯éããåçã®äž¡æ¹ã®ã¯ãŽã¡ã©ã€ãã§ç¥ãããŠããŸããç³ç°å²©ã宿䞻ãšããç£ç¶ã¯ãæ·¡è²ã®åºè³ªã®äžã«ç·è²ãŸãã¯é»è²ã®æŸå°ç¶ã®æãæ£ãããããã±ããã®å å£ã远å ã®ãªã³é žå¡©çš®ã§èŠãããšã§ãé®®ãããªã³ã³ãã©ã¹ããçã¿åºããŸãã
Individual âfireworkâ sprays can be remarkably sharp and translucent, often showing glassy tips and fine radial definition. åã ã®ãè±ç«ãç¶ã¹ãã¬ãŒã¯éåžžã«ã·ã£ãŒãã§åéæã«ãªãããšããããã¬ã©ã¹ã®ãããªå 端ãšçްããªæŸå°ç¶ã®å®çŸ©ã瀺ãããšãå€ãã§ãã
Collectors seek clean, isolated sprays with intact terminations, attractive composition, and strong color. Pieces with multiple colors (yellow transitioning to green) or with complementary species can be especially appealing. ã³ã¬ã¯ã¿ãŒã¯ã端ã厩ããŠããªãæž æœã§å€ç«ããã¹ãã¬ãŒãæŽã£ãæ§æããããŠåŒ·ãè²ãæ±ããŸããè€æ°ã®è²ïŒé»ããç·ãžç§»è¡ãããã®ïŒãè£å®çãªçš®ãå«ãæšæ¬ã¯ç¹ã«é åçã§ãã
Availability has been episodic and typically in smaller sizes, but fine minis and small cabinets from this quarry are modern American classics. å ¥æã¯æç¶çã§ãéåžžã¯å°åãµã€ãºã§ããããã®æ¡ç³å Žããã®åªããããæšæ¬ãå°åãã£ããããæšæ¬ã¯çŸä»£ã®ã¢ã¡ãªã«ã³ã»ã¯ã©ã·ãã¯ãšãããŠããŸãã
Color and translucency:
Habit and form:
Luster and surface quality:
Matrix and composition:
Condition:
Repairs and reattachments:
Cleaning and coatings:
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