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      $70.00 USD
      预计建议零售价:rrp

      7CTS DUMORTIERITE ROUGH SPECIMEN RARE MINERAL RG-4216 RAREGEMS

      1121
      8

      存货单位
      RG-4216
      尺寸(毫米)
      19.600 x 7.700 x 7.400mm
      重量 (cts)
      7.000
      Treatment
      No Treatment
      类型
      Specimen
      颜色

      DUMORTIERITE

      NICE PALE  BLUE COLOUR

      FINE CRYSTAL SPECIMEN


      Dumortierite is a fibrous variably coloured aluminium boro-silicate mineral, Al7BO3(SiO4)3O3. Dumortierite crystallizes in the orthorhombic system typically forming fibrous aggregates of slender prismatic crystals. The crystals are vitreous and vary in color from brown, blue, and green to more rare violet and pink. Substitution of iron and other tri-valent elements for aluminium result in the color variations. It has a Mohs hardness of 7 and a specific gravity of 3.3 to 3.4. Crystals show pleochroism from red to blue to violet. Dumortierite quartz is blue colored quartzcontaining abundant dumortierite inclusions.

      Dumortierite was first described in 1881 for an occurrence in Chaponost, in the Rhône-Alps of France and named for the French paleontologist Eugène Dumortier (1803–1873).[4] It typically occurs in high temperature aluminium rich regional metamorphic rocks, those resulting from contact metamorphism and also in boron rich pegmatites. The most extensive investigation on dumortierite was done on samples from the high grade metamorphic Gfohl unit in Austria by Fuchs et al. (2005).

      It is used in the manufacture of high grade porcelain. It is sometimes mistaken for sodalite and has been used as imitation lapis lazuli.

      Sources of Dumortierite include Austria, Brazil, Canada, France, Italy, Madagascar, Namibia, Nevada, Norway, Peru, Poland, Russia and Sri Lanka.

      TRADING AS TRUEBLUEOPALS / LIGHTNINGOPALS LLC

      运输商 运送至:国家 运送到世界其他地区
      Standard Shipping - Tracked $19.00 / :几天天 $30.00 / :几天天
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      Standard Shipping - Tracked折扣至$19.00 ,适用于包含2或更多商品的订单
      世界其他地区
      Standard Shipping - Tracked折扣至$30.00 ,适用于包含2或更多商品的订单
      FedEx $39.00 / :几天天 $40.00 / :几天天
      :国家
      FedEx折扣至$39.00 ,适用于包含2或更多商品的订单
      世界其他地区
      FedEx折扣至$40.00 ,适用于包含2或更多商品的订单
      DHL $19.00 / :几天天 $30.00 / :几天天
      世界其他地区
      DHL折扣至$30.00 ,适用于包含2或更多商品的订单

      raregems
      raregems
      raregems, all rough
      :城市,国家
      已验证
      :总反馈

      • solusinexistentia
        solusinexistentia
        积极的

        Great quality and price! Item arrived on time. Will purchase from seller again.

      • solusinexistentia
        solusinexistentia
        积极的

        Good experience with seller. Items arrived on time and as described for a good price.

      30%
      优惠券代码 30
      有效期至
      1st Mar 2025

      审计

      Gemstone Sheriff计划允许我们的会员对任何产品申请审核,审核由独立的Gemologist人员完成,负责评估产品描述和图片的准确性。

      送货细节

      船运:
      $30.00 14通过Standard Shipping - Tracked计数天数
      发货自:
      Australia

      付款方式

      • stripe
      该卖家在Australia交易中添加了0.00%税。

      概述

      列表类型 : Standard
      产品编号 : 2034120
      开始 : 14th February 2025 08:53 pm PST
      * 所有价格均以:货币为单位